Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (54 commits)
  [S390] Remove error checking from copy_oldmem_page()
  [S390] qdio: prevent dsci access without adapter interrupts
  [S390] irqstats: split IPI interrupt accounting
  [S390] add missing __tlb_flush_global() for !CONFIG_SMP
  [S390] sparse: fix sparse symbol shadow warning
  [S390] sparse: fix sparse NULL pointer warnings
  [S390] sparse: fix sparse warnings with __user pointers
  [S390] sparse: fix sparse warnings in math-emu
  [S390] sparse: fix sparse warnings about missing prototypes
  [S390] sparse: fix sparse ANSI-C warnings
  [S390] sparse: fix sparse static warnings
  [S390] sparse: fix access past end of array warnings
  [S390] dasd: prevent path verification before resume
  [S390] qdio: remove multicast polling
  [S390] qdio: reset outbound SBAL error states
  [S390] qdio: EQBS retry after CCQ 96
  [S390] qdio: add timestamp for last queue scan time
  [S390] Introduce get_clock_fast()
  [S390] kvm: Handle diagnose 0x10 (release pages)
  [S390] take mmap_sem when walking guest page table
  ...

31 files changed, 395 insertions, 350 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index a1d3ddb..65894f0 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -11,7 +11,6 @@
 #define KMSG_COMPONENT "dasd"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
-#include <linux/kernel_stat.h>
 #include <linux/kmod.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -1594,7 +1593,6 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	unsigned long long now;
 	int expires;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_DAS]++;
 	if (IS_ERR(irb)) {
 		switch (PTR_ERR(irb)) {
 		case -EIO:
@@ -2061,13 +2059,14 @@ void dasd_add_request_tail(struct dasd_ccw_req *cqr)
 /*
  * Wakeup helper for the 'sleep_on' functions.
  */
-static void dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data)
+void dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data)
 {
 	spin_lock_irq(get_ccwdev_lock(cqr->startdev->cdev));
 	cqr->callback_data = DASD_SLEEPON_END_TAG;
 	spin_unlock_irq(get_ccwdev_lock(cqr->startdev->cdev));
 	wake_up(&generic_waitq);
 }
+EXPORT_SYMBOL_GPL(dasd_wakeup_cb);
 
 static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr)
 {
@@ -2167,7 +2166,9 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
 		} else
 			wait_event(generic_waitq, !(device->stopped));
 
-		cqr->callback = dasd_wakeup_cb;
+		if (!cqr->callback)
+			cqr->callback = dasd_wakeup_cb;
+
 		cqr->callback_data = DASD_SLEEPON_START_TAG;
 		dasd_add_request_tail(cqr);
 		if (interruptible) {
@@ -2263,7 +2264,11 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
 	cqr->callback = dasd_wakeup_cb;
 	cqr->callback_data = DASD_SLEEPON_START_TAG;
 	cqr->status = DASD_CQR_QUEUED;
-	list_add(&cqr->devlist, &device->ccw_queue);
+	/*
+	 * add new request as second
+	 * first the terminated cqr needs to be finished
+	 */
+	list_add(&cqr->devlist, device->ccw_queue.next);
 
 	/* let the bh start the request to keep them in order */
 	dasd_schedule_device_bh(device);
@@ -3284,6 +3289,9 @@ int dasd_generic_pm_freeze(struct ccw_device *cdev)
 	if (IS_ERR(device))
 		return PTR_ERR(device);
 
+	/* mark device as suspended */
+	set_bit(DASD_FLAG_SUSPENDED, &device->flags);
+
 	if (device->discipline->freeze)
 		rc = device->discipline->freeze(device);
 
@@ -3358,6 +3366,7 @@ int dasd_generic_restore_device(struct ccw_device *cdev)
 	if (device->block)
 		dasd_schedule_block_bh(device->block);
 
+	clear_bit(DASD_FLAG_SUSPENDED, &device->flags);
 	dasd_put_device(device);
 	return 0;
 }
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 6e835c9..6ab2968 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -844,6 +844,30 @@ static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
 	set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
 }
 
+/*
+ * Wakeup helper for read_conf
+ * if the cqr is not done and needs some error recovery
+ * the buffer has to be re-initialized with the EBCDIC "V1.0"
+ * to show support for virtual device SNEQ
+ */
+static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
+{
+	struct ccw1 *ccw;
+	__u8 *rcd_buffer;
+
+	if (cqr->status !=  DASD_CQR_DONE) {
+		ccw = cqr->cpaddr;
+		rcd_buffer = (__u8 *)((addr_t) ccw->cda);
+		memset(rcd_buffer, 0, sizeof(*rcd_buffer));
+
+		rcd_buffer[0] = 0xE5;
+		rcd_buffer[1] = 0xF1;
+		rcd_buffer[2] = 0x4B;
+		rcd_buffer[3] = 0xF0;
+	}
+	dasd_wakeup_cb(cqr, data);
+}
+
 static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
 					   struct dasd_ccw_req *cqr,
 					   __u8 *rcd_buffer,
@@ -863,6 +887,7 @@ static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
 	clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
 	set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
 	cqr->retries = 5;
+	cqr->callback = read_conf_cb;
 	rc = dasd_sleep_on_immediatly(cqr);
 	return rc;
 }
@@ -900,6 +925,7 @@ static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
 		goto out_error;
 	}
 	dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
+	cqr->callback = read_conf_cb;
 	ret = dasd_sleep_on(cqr);
 	/*
 	 * on success we update the user input parms
@@ -1075,6 +1101,12 @@ static void do_path_verification_work(struct work_struct *work)
 	data = container_of(work, struct path_verification_work_data, worker);
 	device = data->device;
 
+	/* delay path verification until device was resumed */
+	if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
+		schedule_work(work);
+		return;
+	}
+
 	opm = 0;
 	npm = 0;
 	ppm = 0;
@@ -2021,9 +2053,13 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device,
 	/* first of all check for state change pending interrupt */
 	mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
 	if ((scsw_dstat(&irb->scsw) & mask) == mask) {
-		/* for alias only and not in offline processing*/
+		/*
+		 * for alias only, not in offline processing
+		 * and only if not suspended
+		 */
 		if (!device->block && private->lcu &&
-		    !test_bit(DASD_FLAG_OFFLINE, &device->flags)) {
+		    !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
+		    !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
 			/*
 			 * the state change could be caused by an alias
 			 * reassignment remove device from alias handling
@@ -2350,7 +2386,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
 	new_track = 1;
 	end_idaw = 0;
 	len_to_track_end = 0;
-	idaw_dst = 0;
+	idaw_dst = NULL;
 	idaw_len = 0;
 	rq_for_each_segment(bv, req, iter) {
 		dst = page_address(bv->bv_page) + bv->bv_offset;
@@ -2412,7 +2448,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
 			if (end_idaw) {
 				idaws = idal_create_words(idaws, idaw_dst,
 							  idaw_len);
-				idaw_dst = 0;
+				idaw_dst = NULL;
 				idaw_len = 0;
 				end_idaw = 0;
 			}
@@ -3998,6 +4034,7 @@ static struct ccw_driver dasd_eckd_driver = {
 	.thaw	     = dasd_generic_restore_device,
 	.restore     = dasd_generic_restore_device,
 	.uc_handler  = dasd_generic_uc_handler,
+	.int_class   = IOINT_DAS,
 };
 
 /*
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index 4b71b11..a62a753 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -79,6 +79,7 @@ static struct ccw_driver dasd_fba_driver = {
 	.freeze      = dasd_generic_pm_freeze,
 	.thaw	     = dasd_generic_restore_device,
 	.restore     = dasd_generic_restore_device,
+	.int_class   = IOINT_DAS,
 };
 
 static void
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 1dd12bd..afe8c33 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -516,6 +516,7 @@ struct dasd_block {
 					 */
 #define DASD_FLAG_IS_RESERVED	7	/* The device is reserved */
 #define DASD_FLAG_LOCK_STOLEN	8	/* The device lock was stolen */
+#define DASD_FLAG_SUSPENDED	9	/* The device was suspended */
 
 
 void dasd_put_device_wake(struct dasd_device *);
@@ -643,6 +644,7 @@ struct dasd_ccw_req *
 dasd_smalloc_request(int , int, int, struct dasd_device *);
 void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *);
 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
+void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
 
 static inline int
 dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device)
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 694464c..934458a 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -9,7 +9,6 @@
  *	      Dan Morrison, IBM Corporation <dmorriso@cse.buffalo.edu>
  */
 
-#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kdev_t.h>
@@ -362,7 +361,6 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm,
 	int cstat, dstat;
 	int count;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_C15]++;
 	raw = dev_get_drvdata(&cdev->dev);
 	req = (struct raw3215_req *) intparm;
 	cstat = irb->scsw.cmd.cstat;
@@ -776,6 +774,7 @@ static struct ccw_driver raw3215_ccw_driver = {
 	.freeze		= &raw3215_pm_stop,
 	.thaw		= &raw3215_pm_start,
 	.restore	= &raw3215_pm_start,
+	.int_class	= IOINT_C15,
 };
 
 #ifdef CONFIG_TN3215_CONSOLE
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 810ac38..e5cb924 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -7,7 +7,6 @@
  *     Copyright IBM Corp. 2003, 2009
  */
 
-#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -330,7 +329,6 @@ raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
 	struct raw3270_request *rq;
 	int rc;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_C70]++;
 	rp = dev_get_drvdata(&cdev->dev);
 	if (!rp)
 		return;
@@ -1398,6 +1396,7 @@ static struct ccw_driver raw3270_ccw_driver = {
 	.freeze		= &raw3270_pm_stop,
 	.thaw		= &raw3270_pm_start,
 	.restore	= &raw3270_pm_start,
+	.int_class	= IOINT_C70,
 };
 
 static int
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index 837e010..0b54a91 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -61,8 +61,8 @@ static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb)
 	rc = sclp_service_call(cmd, sccb);
 	if (rc)
 		goto out;
-	__load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT |
-			PSW_MASK_WAIT | PSW_DEFAULT_KEY);
+	__load_psw_mask(PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA |
+			PSW_MASK_BA | PSW_MASK_EXT | PSW_MASK_WAIT);
 	local_irq_disable();
 out:
 	/* Contents of the sccb might have changed. */
diff --git a/drivers/s390/char/sclp_quiesce.c b/drivers/s390/char/sclp_quiesce.c
index a90a02c..87fc0ac 100644
--- a/drivers/s390/char/sclp_quiesce.c
+++ b/drivers/s390/char/sclp_quiesce.c
@@ -30,7 +30,8 @@ static void do_machine_quiesce(void)
 	psw_t quiesce_psw;
 
 	smp_send_stop();
-	quiesce_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT;
+	quiesce_psw.mask =
+		PSW_MASK_BASE | PSW_MASK_EA | PSW_MASK_BA | PSW_MASK_WAIT;
 	quiesce_psw.addr = 0xfff;
 	__load_psw(quiesce_psw);
 }
diff --git a/drivers/s390/char/tape_34xx.c b/drivers/s390/char/tape_34xx.c
index 9eff2df..934ef33 100644
--- a/drivers/s390/char/tape_34xx.c
+++ b/drivers/s390/char/tape_34xx.c
@@ -1330,6 +1330,7 @@ static struct ccw_driver tape_34xx_driver = {
 	.set_online = tape_34xx_online,
 	.set_offline = tape_generic_offline,
 	.freeze = tape_generic_pm_suspend,
+	.int_class = IOINT_TAP,
 };
 
 static int
diff --git a/drivers/s390/char/tape_3590.c b/drivers/s390/char/tape_3590.c
index a7d5707..49c6aab 100644
--- a/drivers/s390/char/tape_3590.c
+++ b/drivers/s390/char/tape_3590.c
@@ -1762,6 +1762,7 @@ static struct ccw_driver tape_3590_driver = {
 	.set_offline = tape_generic_offline,
 	.set_online = tape_3590_online,
 	.freeze = tape_generic_pm_suspend,
+	.int_class = IOINT_TAP,
 };
 
 /*
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index 7978a0a..b3a3e8e 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -14,7 +14,6 @@
 #define KMSG_COMPONENT "tape"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
-#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/init.h>	     // for kernel parameters
 #include <linux/kmod.h>	     // for requesting modules
@@ -1115,7 +1114,6 @@ __tape_do_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
 	struct tape_request *request;
 	int rc;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_TAP]++;
 	device = dev_get_drvdata(&cdev->dev);
 	if (device == NULL) {
 		return;
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index f6b00c3..d291a54 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -11,7 +11,6 @@
 #define KMSG_COMPONENT "vmur"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
-#include <linux/kernel_stat.h>
 #include <linux/cdev.h>
 #include <linux/slab.h>
 
@@ -74,6 +73,7 @@ static struct ccw_driver ur_driver = {
 	.set_online	= ur_set_online,
 	.set_offline	= ur_set_offline,
 	.freeze		= ur_pm_suspend,
+	.int_class	= IOINT_VMR,
 };
 
 static DEFINE_MUTEX(vmur_mutex);
@@ -305,7 +305,6 @@ static void ur_int_handler(struct ccw_device *cdev, unsigned long intparm,
 {
 	struct urdev *urd;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_VMR]++;
 	TRACE("ur_int_handler: intparm=0x%lx cstat=%02x dstat=%02x res=%u\n",
 	      intparm, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
 	      irb->scsw.cmd.count);
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 3b94044..43068fb 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -16,6 +16,7 @@
 #include <linux/slab.h>
 #include <linux/miscdevice.h>
 #include <linux/debugfs.h>
+#include <linux/module.h>
 #include <asm/asm-offsets.h>
 #include <asm/ipl.h>
 #include <asm/sclp.h>
@@ -142,22 +143,6 @@ static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
 	return memcpy_hsa(dest, src, count, TO_KERNEL);
 }
 
-static int memcpy_real_user(void __user *dest, unsigned long src, size_t count)
-{
-	static char buf[4096];
-	int offs = 0, size;
-
-	while (offs < count) {
-		size = min(sizeof(buf), count - offs);
-		if (memcpy_real(buf, (void *) src + offs, size))
-			return -EFAULT;
-		if (copy_to_user(dest + offs, buf, size))
-			return -EFAULT;
-		offs += size;
-	}
-	return 0;
-}
-
 static int __init init_cpu_info(enum arch_id arch)
 {
 	struct save_area *sa;
@@ -346,8 +331,8 @@ static ssize_t zcore_read(struct file *file, char __user *buf, size_t count,
 
 	/* Copy from real mem */
 	size = count - mem_offs - hdr_count;
-	rc = memcpy_real_user(buf + hdr_count + mem_offs, mem_start + mem_offs,
-			      size);
+	rc = copy_to_user_real(buf + hdr_count + mem_offs,
+			       (void *) mem_start + mem_offs, size);
 	if (rc)
 		goto fail;
 
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 5c56741..4f1989d 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -29,31 +29,20 @@
 
 /* a device matches a driver if all its slave devices match the same
  * entry of the driver */
-static int
-ccwgroup_bus_match (struct device * dev, struct device_driver * drv)
+static int ccwgroup_bus_match(struct device *dev, struct device_driver * drv)
 {
-	struct ccwgroup_device *gdev;
-	struct ccwgroup_driver *gdrv;
-
-	gdev = to_ccwgroupdev(dev);
-	gdrv = to_ccwgroupdrv(drv);
+	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(drv);
 
 	if (gdev->creator_id == gdrv->driver_id)
 		return 1;
 
 	return 0;
 }
-static int
-ccwgroup_uevent (struct device *dev, struct kobj_uevent_env *env)
-{
-	/* TODO */
-	return 0;
-}
 
 static struct bus_type ccwgroup_bus_type;
 
-static void
-__ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
+static void __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
 {
 	int i;
 	char str[8];
@@ -63,7 +52,6 @@ __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
 		sysfs_remove_link(&gdev->dev.kobj, str);
 		sysfs_remove_link(&gdev->cdev[i]->dev.kobj, "group_device");
 	}
-	
 }
 
 /*
@@ -87,6 +75,87 @@ static void __ccwgroup_remove_cdev_refs(struct ccwgroup_device *gdev)
 	}
 }
 
+static int ccwgroup_set_online(struct ccwgroup_device *gdev)
+{
+	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
+	int ret = 0;
+
+	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
+		return -EAGAIN;
+	if (gdev->state == CCWGROUP_ONLINE)
+		goto out;
+	if (gdrv->set_online)
+		ret = gdrv->set_online(gdev);
+	if (ret)
+		goto out;
+
+	gdev->state = CCWGROUP_ONLINE;
+out:
+	atomic_set(&gdev->onoff, 0);
+	return ret;
+}
+
+static int ccwgroup_set_offline(struct ccwgroup_device *gdev)
+{
+	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
+	int ret = 0;
+
+	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
+		return -EAGAIN;
+	if (gdev->state == CCWGROUP_OFFLINE)
+		goto out;
+	if (gdrv->set_offline)
+		ret = gdrv->set_offline(gdev);
+	if (ret)
+		goto out;
+
+	gdev->state = CCWGROUP_OFFLINE;
+out:
+	atomic_set(&gdev->onoff, 0);
+	return ret;
+}
+
+static ssize_t ccwgroup_online_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
+	unsigned long value;
+	int ret;
+
+	if (!dev->driver)
+		return -EINVAL;
+	if (!try_module_get(gdrv->driver.owner))
+		return -EINVAL;
+
+	ret = strict_strtoul(buf, 0, &value);
+	if (ret)
+		goto out;
+
+	if (value == 1)
+		ret = ccwgroup_set_online(gdev);
+	else if (value == 0)
+		ret = ccwgroup_set_offline(gdev);
+	else
+		ret = -EINVAL;
+out:
+	module_put(gdrv->driver.owner);
+	return (ret == 0) ? count : ret;
+}
+
+static ssize_t ccwgroup_online_show(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+	int online;
+
+	online = (gdev->state == CCWGROUP_ONLINE) ? 1 : 0;
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n", online);
+}
+
 /*
  * Provide an 'ungroup' attribute so the user can remove group devices no
  * longer needed or accidentially created. Saves memory :)
@@ -104,14 +173,13 @@ static void ccwgroup_ungroup_callback(struct device *dev)
 	mutex_unlock(&gdev->reg_mutex);
 }
 
-static ssize_t
-ccwgroup_ungroup_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+static ssize_t ccwgroup_ungroup_store(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count)
 {
-	struct ccwgroup_device *gdev;
+	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
 	int rc;
 
-	gdev = to_ccwgroupdev(dev);
-
 	/* Prevent concurrent online/offline processing and ungrouping. */
 	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
 		return -EAGAIN;
@@ -132,24 +200,35 @@ out:
 	}
 	return count;
 }
-
 static DEVICE_ATTR(ungroup, 0200, NULL, ccwgroup_ungroup_store);
+static DEVICE_ATTR(online, 0644, ccwgroup_online_show, ccwgroup_online_store);
 
-static void
-ccwgroup_release (struct device *dev)
+static struct attribute *ccwgroup_attrs[] = {
+	&dev_attr_online.attr,
+	&dev_attr_ungroup.attr,
+	NULL,
+};
+static struct attribute_group ccwgroup_attr_group = {
+	.attrs = ccwgroup_attrs,
+};
+static const struct attribute_group *ccwgroup_attr_groups[] = {
+	&ccwgroup_attr_group,
+	NULL,
+};
+
+static void ccwgroup_release(struct device *dev)
 {
 	kfree(to_ccwgroupdev(dev));
 }
 
-static int
-__ccwgroup_create_symlinks(struct ccwgroup_device *gdev)
+static int __ccwgroup_create_symlinks(struct ccwgroup_device *gdev)
 {
 	char str[8];
 	int i, rc;
 
 	for (i = 0; i < gdev->count; i++) {
-		rc = sysfs_create_link(&gdev->cdev[i]->dev.kobj, &gdev->dev.kobj,
-				       "group_device");
+		rc = sysfs_create_link(&gdev->cdev[i]->dev.kobj,
+				       &gdev->dev.kobj, "group_device");
 		if (rc) {
 			for (--i; i >= 0; i--)
 				sysfs_remove_link(&gdev->cdev[i]->dev.kobj,
@@ -159,8 +238,8 @@ __ccwgroup_create_symlinks(struct ccwgroup_device *gdev)
 	}
 	for (i = 0; i < gdev->count; i++) {
 		sprintf(str, "cdev%d", i);
-		rc = sysfs_create_link(&gdev->dev.kobj, &gdev->cdev[i]->dev.kobj,
-				       str);
+		rc = sysfs_create_link(&gdev->dev.kobj,
+				       &gdev->cdev[i]->dev.kobj, str);
 		if (rc) {
 			for (--i; i >= 0; i--) {
 				sprintf(str, "cdev%d", i);
@@ -293,26 +372,17 @@ int ccwgroup_create_from_string(struct device *root, unsigned int creator_id,
 	}
 
 	dev_set_name(&gdev->dev, "%s", dev_name(&gdev->cdev[0]->dev));
-
+	gdev->dev.groups = ccwgroup_attr_groups;
 	rc = device_add(&gdev->dev);
 	if (rc)
 		goto error;
-	get_device(&gdev->dev);
-	rc = device_create_file(&gdev->dev, &dev_attr_ungroup);
-
+	rc = __ccwgroup_create_symlinks(gdev);
 	if (rc) {
-		device_unregister(&gdev->dev);
+		device_del(&gdev->dev);
 		goto error;
 	}
-
-	rc = __ccwgroup_create_symlinks(gdev);
-	if (!rc) {
-		mutex_unlock(&gdev->reg_mutex);
-		put_device(&gdev->dev);
-		return 0;
-	}
-	device_remove_file(&gdev->dev, &dev_attr_ungroup);
-	device_unregister(&gdev->dev);
+	mutex_unlock(&gdev->reg_mutex);
+	return 0;
 error:
 	for (i = 0; i < num_devices; i++)
 		if (gdev->cdev[i]) {
@@ -330,7 +400,15 @@ error:
 EXPORT_SYMBOL(ccwgroup_create_from_string);
 
 static int ccwgroup_notifier(struct notifier_block *nb, unsigned long action,
-			     void *data);
+			     void *data)
+{
+	struct device *dev = data;
+
+	if (action == BUS_NOTIFY_UNBIND_DRIVER)
+		device_schedule_callback(dev, ccwgroup_ungroup_callback);
+
+	return NOTIFY_OK;
+}
 
 static struct notifier_block ccwgroup_nb = {
 	.notifier_call = ccwgroup_notifier
@@ -362,138 +440,21 @@ module_exit(cleanup_ccwgroup);
 
 /************************** driver stuff ******************************/
 
-static int
-ccwgroup_set_online(struct ccwgroup_device *gdev)
+static int ccwgroup_probe(struct device *dev)
 {
-	struct ccwgroup_driver *gdrv;
-	int ret;
-
-	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
-		return -EAGAIN;
-	if (gdev->state == CCWGROUP_ONLINE) {
-		ret = 0;
-		goto out;
-	}
-	if (!gdev->dev.driver) {
-		ret = -EINVAL;
-		goto out;
-	}
-	gdrv = to_ccwgroupdrv (gdev->dev.driver);
-	if ((ret = gdrv->set_online ? gdrv->set_online(gdev) : 0))
-		goto out;
-
-	gdev->state = CCWGROUP_ONLINE;
- out:
-	atomic_set(&gdev->onoff, 0);
-	return ret;
-}
-
-static int
-ccwgroup_set_offline(struct ccwgroup_device *gdev)
-{
-	struct ccwgroup_driver *gdrv;
-	int ret;
-
-	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
-		return -EAGAIN;
-	if (gdev->state == CCWGROUP_OFFLINE) {
-		ret = 0;
-		goto out;
-	}
-	if (!gdev->dev.driver) {
-		ret = -EINVAL;
-		goto out;
-	}
-	gdrv = to_ccwgroupdrv (gdev->dev.driver);
-	if ((ret = gdrv->set_offline ? gdrv->set_offline(gdev) : 0))
-		goto out;
-
-	gdev->state = CCWGROUP_OFFLINE;
- out:
-	atomic_set(&gdev->onoff, 0);
-	return ret;
-}
-
-static ssize_t
-ccwgroup_online_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct ccwgroup_device *gdev;
-	struct ccwgroup_driver *gdrv;
-	unsigned long value;
-	int ret;
-
-	if (!dev->driver)
-		return -ENODEV;
-
-	gdev = to_ccwgroupdev(dev);
-	gdrv = to_ccwgroupdrv(dev->driver);
-
-	if (!try_module_get(gdrv->driver.owner))
-		return -EINVAL;
-
-	ret = strict_strtoul(buf, 0, &value);
-	if (ret)
-		goto out;
-
-	if (value == 1)
-		ret = ccwgroup_set_online(gdev);
-	else if (value == 0)
-		ret = ccwgroup_set_offline(gdev);
-	else
-		ret = -EINVAL;
-out:
-	module_put(gdrv->driver.owner);
-	return (ret == 0) ? count : ret;
-}
-
-static ssize_t
-ccwgroup_online_show (struct device *dev, struct device_attribute *attr, char *buf)
-{
-	int online;
-
-	online = (to_ccwgroupdev(dev)->state == CCWGROUP_ONLINE);
-
-	return sprintf(buf, online ? "1\n" : "0\n");
-}
-
-static DEVICE_ATTR(online, 0644, ccwgroup_online_show, ccwgroup_online_store);
-
-static int
-ccwgroup_probe (struct device *dev)
-{
-	struct ccwgroup_device *gdev;
-	struct ccwgroup_driver *gdrv;
-
-	int ret;
-
-	gdev = to_ccwgroupdev(dev);
-	gdrv = to_ccwgroupdrv(dev->driver);
-
-	if ((ret = device_create_file(dev, &dev_attr_online)))
-		return ret;
-
-	ret = gdrv->probe ? gdrv->probe(gdev) : -ENODEV;
-	if (ret)
-		device_remove_file(dev, &dev_attr_online);
+	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
 
-	return ret;
+	return gdrv->probe ? gdrv->probe(gdev) : -ENODEV;
 }
 
-static int
-ccwgroup_remove (struct device *dev)
+static int ccwgroup_remove(struct device *dev)
 {
-	struct ccwgroup_device *gdev;
-	struct ccwgroup_driver *gdrv;
-
-	device_remove_file(dev, &dev_attr_online);
-	device_remove_file(dev, &dev_attr_ungroup);
+	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
 
 	if (!dev->driver)
 		return 0;
-
-	gdev = to_ccwgroupdev(dev);
-	gdrv = to_ccwgroupdrv(dev->driver);
-
 	if (gdrv->remove)
 		gdrv->remove(gdev);
 
@@ -502,15 +463,11 @@ ccwgroup_remove (struct device *dev)
 
 static void ccwgroup_shutdown(struct device *dev)
 {
-	struct ccwgroup_device *gdev;
-	struct ccwgroup_driver *gdrv;
+	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
+	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
 
 	if (!dev->driver)
 		return;
-
-	gdev = to_ccwgroupdev(dev);
-	gdrv = to_ccwgroupdrv(dev->driver);
-
 	if (gdrv->shutdown)
 		gdrv->shutdown(gdev);
 }
@@ -586,26 +543,12 @@ static const struct dev_pm_ops ccwgroup_pm_ops = {
 static struct bus_type ccwgroup_bus_type = {
 	.name   = "ccwgroup",
 	.match  = ccwgroup_bus_match,
-	.uevent = ccwgroup_uevent,
 	.probe  = ccwgroup_probe,
 	.remove = ccwgroup_remove,
 	.shutdown = ccwgroup_shutdown,
 	.pm = &ccwgroup_pm_ops,
 };
 
-
-static int ccwgroup_notifier(struct notifier_block *nb, unsigned long action,
-			     void *data)
-{
-	struct device *dev = data;
-
-	if (action == BUS_NOTIFY_UNBIND_DRIVER)
-		device_schedule_callback(dev, ccwgroup_ungroup_callback);
-
-	return NOTIFY_OK;
-}
-
-
 /**
  * ccwgroup_driver_register() - register a ccw group driver
  * @cdriver: driver to be registered
@@ -619,9 +562,9 @@ int ccwgroup_driver_register(struct ccwgroup_driver *cdriver)
 
 	return driver_register(&cdriver->driver);
 }
+EXPORT_SYMBOL(ccwgroup_driver_register);
 
-static int
-__ccwgroup_match_all(struct device *dev, void *data)
+static int __ccwgroup_match_all(struct device *dev, void *data)
 {
 	return 1;
 }
@@ -652,6 +595,7 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
 	put_driver(&cdriver->driver);
 	driver_unregister(&cdriver->driver);
 }
+EXPORT_SYMBOL(ccwgroup_driver_unregister);
 
 /**
  * ccwgroup_probe_ccwdev() - probe function for slave devices
@@ -666,6 +610,7 @@ int ccwgroup_probe_ccwdev(struct ccw_device *cdev)
 {
 	return 0;
 }
+EXPORT_SYMBOL(ccwgroup_probe_ccwdev);
 
 /**
  * ccwgroup_remove_ccwdev() - remove function for slave devices
@@ -702,9 +647,5 @@ void ccwgroup_remove_ccwdev(struct ccw_device *cdev)
 	/* Release ccwgroup device reference for local processing. */
 	put_device(&gdev->dev);
 }
-
-MODULE_LICENSE("GPL");
-EXPORT_SYMBOL(ccwgroup_driver_register);
-EXPORT_SYMBOL(ccwgroup_driver_unregister);
-EXPORT_SYMBOL(ccwgroup_probe_ccwdev);
 EXPORT_SYMBOL(ccwgroup_remove_ccwdev);
+MODULE_LICENSE("GPL");
diff --git a/drivers/s390/cio/ccwreq.c b/drivers/s390/cio/ccwreq.c
index d15f8b4..5156264 100644
--- a/drivers/s390/cio/ccwreq.c
+++ b/drivers/s390/cio/ccwreq.c
@@ -1,10 +1,13 @@
 /*
  *  Handling of internal CCW device requests.
  *
- *    Copyright IBM Corp. 2009
+ *    Copyright IBM Corp. 2009, 2011
  *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
  */
 
+#define KMSG_COMPONENT "cio"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
 #include <linux/types.h>
 #include <linux/err.h>
 #include <asm/ccwdev.h>
@@ -323,7 +326,21 @@ void ccw_request_timeout(struct ccw_device *cdev)
 {
 	struct subchannel *sch = to_subchannel(cdev->dev.parent);
 	struct ccw_request *req = &cdev->private->req;
-	int rc;
+	int rc = -ENODEV, chp;
+
+	if (cio_update_schib(sch))
+		goto err;
+
+	for (chp = 0; chp < 8; chp++) {
+		if ((0x80 >> chp) & sch->schib.pmcw.lpum)
+			pr_warning("%s: No interrupt was received within %lus "
+				   "(CS=%02x, DS=%02x, CHPID=%x.%02x)\n",
+				   dev_name(&cdev->dev), req->timeout / HZ,
+				   scsw_cstat(&sch->schib.scsw),
+				   scsw_dstat(&sch->schib.scsw),
+				   sch->schid.cssid,
+				   sch->schib.pmcw.chpid[chp]);
+	}
 
 	if (!ccwreq_next_path(cdev)) {
 		/* set the final return code for this request */
@@ -342,7 +359,7 @@ err:
  * ccw_request_notoper - notoper handler for I/O request procedure
  * @cdev: ccw device
  *
- * Handle timeout during I/O request procedure.
+ * Handle notoper during I/O request procedure.
  */
 void ccw_request_notoper(struct ccw_device *cdev)
 {
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c
index e950f1a..0c87b0f 100644
--- a/drivers/s390/cio/chsc_sch.c
+++ b/drivers/s390/cio/chsc_sch.c
@@ -1,7 +1,7 @@
 /*
  * Driver for s390 chsc subchannels
  *
- * Copyright IBM Corp. 2008, 2009
+ * Copyright IBM Corp. 2008, 2011
  *
  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
  *
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/uaccess.h>
 #include <linux/miscdevice.h>
+#include <linux/kernel_stat.h>
 
 #include <asm/compat.h>
 #include <asm/cio.h>
@@ -56,6 +57,8 @@ static void chsc_subchannel_irq(struct subchannel *sch)
 
 	CHSC_LOG(4, "irb");
 	CHSC_LOG_HEX(4, irb, sizeof(*irb));
+	kstat_cpu(smp_processor_id()).irqs[IOINT_CSC]++;
+
 	/* Copy irb to provided request and set done. */
 	if (!request) {
 		CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n",
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index eb3140e..dc67c39 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -622,6 +622,7 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
 		sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
 		if (!sch) {
 			/* Clear pending interrupt condition. */
+			kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
 			tsch(tpi_info->schid, irb);
 			continue;
 		}
@@ -634,7 +635,10 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
 			/* Call interrupt handler if there is one. */
 			if (sch->driver && sch->driver->irq)
 				sch->driver->irq(sch);
-		}
+			else
+				kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
+		} else
+			kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
 		spin_unlock(sch->lock);
 		/*
 		 * Are more interrupts pending?
@@ -667,18 +671,23 @@ static int cio_tpi(void)
 	tpi_info = (struct tpi_info *)&S390_lowcore.subchannel_id;
 	if (tpi(NULL) != 1)
 		return 0;
+	kstat_cpu(smp_processor_id()).irqs[IO_INTERRUPT]++;
 	if (tpi_info->adapter_IO) {
 		do_adapter_IO(tpi_info->isc);
 		return 1;
 	}
 	irb = (struct irb *)&S390_lowcore.irb;
 	/* Store interrupt response block to lowcore. */
-	if (tsch(tpi_info->schid, irb) != 0)
+	if (tsch(tpi_info->schid, irb) != 0) {
 		/* Not status pending or not operational. */
+		kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
 		return 1;
+	}
 	sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
-	if (!sch)
+	if (!sch) {
+		kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
 		return 1;
+	}
 	irq_context = in_interrupt();
 	if (!irq_context)
 		local_bh_disable();
@@ -687,6 +696,8 @@ static int cio_tpi(void)
 	memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
 	if (sch->driver && sch->driver->irq)
 		sch->driver->irq(sch);
+	else
+		kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
 	spin_unlock(sch->lock);
 	irq_exit();
 	if (!irq_context)
@@ -1058,7 +1069,7 @@ void reipl_ccw_dev(struct ccw_dev_id *devid)
 {
 	struct subchannel_id schid;
 
-	s390_reset_system();
+	s390_reset_system(NULL, NULL);
 	if (reipl_find_schid(devid, &schid) != 0)
 		panic("IPL Device not found\n");
 	do_reipl_asm(*((__u32*)&schid));
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 80ebddd..33bb4d8 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -133,6 +133,8 @@ struct channel_subsystem {
 
 extern struct channel_subsystem *channel_subsystems[];
 
+void channel_subsystem_reinit(void);
+
 /* Helper functions to build lists for the slow path. */
 void css_schedule_eval(struct subchannel_id schid);
 void css_schedule_eval_all(void);
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 8e04c00..d734f4a 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -21,6 +21,7 @@
 #include <linux/device.h>
 #include <linux/workqueue.h>
 #include <linux/timer.h>
+#include <linux/kernel_stat.h>
 
 #include <asm/ccwdev.h>
 #include <asm/cio.h>
@@ -747,6 +748,7 @@ static int io_subchannel_initialize_dev(struct subchannel *sch,
 					struct ccw_device *cdev)
 {
 	cdev->private->cdev = cdev;
+	cdev->private->int_class = IOINT_CIO;
 	atomic_set(&cdev->private->onoff, 0);
 	cdev->dev.parent = &sch->dev;
 	cdev->dev.release = ccw_device_release;
@@ -1010,6 +1012,8 @@ static void io_subchannel_irq(struct subchannel *sch)
 	CIO_TRACE_EVENT(6, dev_name(&sch->dev));
 	if (cdev)
 		dev_fsm_event(cdev, DEV_EVENT_INTERRUPT);
+	else
+		kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
 }
 
 void io_subchannel_init_config(struct subchannel *sch)
@@ -1621,6 +1625,7 @@ ccw_device_probe_console(void)
 	memset(&console_private, 0, sizeof(struct ccw_device_private));
 	console_cdev.private = &console_private;
 	console_private.cdev = &console_cdev;
+	console_private.int_class = IOINT_CIO;
 	ret = ccw_device_console_enable(&console_cdev, sch);
 	if (ret) {
 		cio_release_console();
@@ -1702,11 +1707,18 @@ ccw_device_probe (struct device *dev)
 	int ret;
 
 	cdev->drv = cdrv; /* to let the driver call _set_online */
+	/* Note: we interpret class 0 in this context as an uninitialized
+	 * field since it translates to a non-I/O interrupt class. */
+	if (cdrv->int_class != 0)
+		cdev->private->int_class = cdrv->int_class;
+	else
+		cdev->private->int_class = IOINT_CIO;
 
 	ret = cdrv->probe ? cdrv->probe(cdev) : -ENODEV;
 
 	if (ret) {
 		cdev->drv = NULL;
+		cdev->private->int_class = IOINT_CIO;
 		return ret;
 	}
 
@@ -1740,6 +1752,7 @@ ccw_device_remove (struct device *dev)
 	}
 	ccw_device_set_timeout(cdev, 0);
 	cdev->drv = NULL;
+	cdev->private->int_class = IOINT_CIO;
 	return 0;
 }
 
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h
index 0b7245c..179824b 100644
--- a/drivers/s390/cio/device.h
+++ b/drivers/s390/cio/device.h
@@ -5,6 +5,7 @@
 #include <linux/atomic.h>
 #include <linux/wait.h>
 #include <linux/notifier.h>
+#include <linux/kernel_stat.h>
 #include "io_sch.h"
 
 /*
@@ -56,7 +57,17 @@ extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS];
 static inline void
 dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event)
 {
-	dev_jumptable[cdev->private->state][dev_event](cdev, dev_event);
+	int state = cdev->private->state;
+
+	if (dev_event == DEV_EVENT_INTERRUPT) {
+		if (state == DEV_STATE_ONLINE)
+			kstat_cpu(smp_processor_id()).
+				irqs[cdev->private->int_class]++;
+		else if (state != DEV_STATE_CMFCHANGE &&
+			 state != DEV_STATE_CMFUPDATE)
+			kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++;
+	}
+	dev_jumptable[state][dev_event](cdev, dev_event);
 }
 
 /*
diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h
index ba31ad8..2ebb492 100644
--- a/drivers/s390/cio/io_sch.h
+++ b/drivers/s390/cio/io_sch.h
@@ -4,6 +4,7 @@
 #include <linux/types.h>
 #include <asm/schid.h>
 #include <asm/ccwdev.h>
+#include <asm/irq.h>
 #include "css.h"
 #include "orb.h"
 
@@ -157,6 +158,7 @@ struct ccw_device_private {
 	struct list_head cmb_list;	/* list of measured devices */
 	u64 cmb_start_time;		/* clock value of cmb reset */
 	void *cmb_wait;			/* deferred cmb enable/disable */
+	enum interruption_class int_class;
 };
 
 static inline int rsch(struct subchannel_id schid)
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 3dd8644..b962ffb 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -18,14 +18,6 @@
 #define QDIO_BUSY_BIT_RETRIES		1000		/* = 10s retry time */
 #define QDIO_INPUT_THRESHOLD		(500 << 12)	/* 500 microseconds */
 
-/*
- * if an asynchronous HiperSockets queue runs full, the 10 seconds timer wait
- * till next initiative to give transmitted skbs back to the stack is too long.
- * Therefore polling is started in case of multicast queue is filled more
- * than 50 percent.
- */
-#define QDIO_IQDIO_POLL_LVL		65	/* HS multicast queue */
-
 enum qdio_irq_states {
 	QDIO_IRQ_STATE_INACTIVE,
 	QDIO_IRQ_STATE_ESTABLISHED,
@@ -290,6 +282,9 @@ struct qdio_q {
 	/* error condition during a data transfer */
 	unsigned int qdio_error;
 
+	/* last scan of the queue */
+	u64 timestamp;
+
 	struct tasklet_struct tasklet;
 	struct qdio_queue_perf_stat q_stats;
 
@@ -423,31 +418,7 @@ static inline int multicast_outbound(struct qdio_q *q)
 #define queue_irqs_disabled(q)			\
 	(test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0)
 
-#define TIQDIO_SHARED_IND		63
-
-/* device state change indicators */
-struct indicator_t {
-	u32 ind;	/* u32 because of compare-and-swap performance */
-	atomic_t count; /* use count, 0 or 1 for non-shared indicators */
-};
-
-extern struct indicator_t *q_indicators;
-
-static inline int has_multiple_inq_on_dsci(struct qdio_irq *irq)
-{
-	return irq->nr_input_qs > 1;
-}
-
-static inline int references_shared_dsci(struct qdio_irq *irq)
-{
-	return irq->dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
-}
-
-static inline int shared_ind(struct qdio_q *q)
-{
-	struct qdio_irq *i = q->irq_ptr;
-	return references_shared_dsci(i) || has_multiple_inq_on_dsci(i);
-}
+extern u64 last_ai_time;
 
 /* prototypes for thin interrupt */
 void qdio_setup_thinint(struct qdio_irq *irq_ptr);
@@ -460,7 +431,8 @@ int tiqdio_allocate_memory(void);
 void tiqdio_free_memory(void);
 int tiqdio_register_thinints(void);
 void tiqdio_unregister_thinints(void);
-
+void clear_nonshared_ind(struct qdio_irq *);
+int test_nonshared_ind(struct qdio_irq *);
 
 /* prototypes for setup */
 void qdio_inbound_processing(unsigned long data);
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index aaf7f93..ed68245 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -54,15 +54,17 @@ static int qstat_show(struct seq_file *m, void *v)
 	if (!q)
 		return 0;
 
-	seq_printf(m, "DSCI: %d   nr_used: %d\n",
-		   *(u32 *)q->irq_ptr->dsci, atomic_read(&q->nr_buf_used));
-	seq_printf(m, "ftc: %d  last_move: %d\n",
+	seq_printf(m, "Timestamp: %Lx  Last AI: %Lx\n",
+		   q->timestamp, last_ai_time);
+	seq_printf(m, "nr_used: %d  ftc: %d  last_move: %d\n",
+		   atomic_read(&q->nr_buf_used),
 		   q->first_to_check, q->last_move);
 	if (q->is_input_q) {
 		seq_printf(m, "polling: %d  ack start: %d  ack count: %d\n",
 			   q->u.in.polling, q->u.in.ack_start,
 			   q->u.in.ack_count);
-		seq_printf(m, "IRQs disabled: %u\n",
+		seq_printf(m, "DSCI: %d   IRQs disabled: %u\n",
+			   *(u32 *)q->irq_ptr->dsci,
 			   test_bit(QDIO_QUEUE_IRQS_DISABLED,
 			   &q->u.in.queue_irq_state));
 	}
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 6547ff4..3ef8d07 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -15,7 +15,6 @@
 #include <linux/delay.h>
 #include <linux/gfp.h>
 #include <linux/io.h>
-#include <linux/kernel_stat.h>
 #include <linux/atomic.h>
 #include <asm/debug.h>
 #include <asm/qdio.h>
@@ -105,9 +104,12 @@ static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
 	/* all done or next buffer state different */
 	if (ccq == 0 || ccq == 32)
 		return 0;
-	/* not all buffers processed */
-	if (ccq == 96 || ccq == 97)
+	/* no buffer processed */
+	if (ccq == 97)
 		return 1;
+	/* not all buffers processed */
+	if (ccq == 96)
+		return 2;
 	/* notify devices immediately */
 	DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq);
 	return -EIO;
@@ -127,10 +129,8 @@ static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
 static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
 			int start, int count, int auto_ack)
 {
+	int rc, tmp_count = count, tmp_start = start, nr = q->nr, retried = 0;
 	unsigned int ccq = 0;
-	int tmp_count = count, tmp_start = start;
-	int nr = q->nr;
-	int rc;
 
 	BUG_ON(!q->irq_ptr->sch_token);
 	qperf_inc(q, eqbs);
@@ -141,30 +141,34 @@ again:
 	ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count,
 		      auto_ack);
 	rc = qdio_check_ccq(q, ccq);
-
-	/* At least one buffer was processed, return and extract the remaining
-	 * buffers later.
-	 */
-	if ((ccq == 96) && (count != tmp_count)) {
-		qperf_inc(q, eqbs_partial);
-		return (count - tmp_count);
-	}
+	if (!rc)
+		return count - tmp_count;
 
 	if (rc == 1) {
 		DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq);
 		goto again;
 	}
 
-	if (rc < 0) {
-		DBF_ERROR("%4x EQBS ERROR", SCH_NO(q));
-		DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
-		q->handler(q->irq_ptr->cdev,
-			   QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
-			   q->nr, q->first_to_kick, count,
-			   q->irq_ptr->int_parm);
-		return 0;
+	if (rc == 2) {
+		BUG_ON(tmp_count == count);
+		qperf_inc(q, eqbs_partial);
+		DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS part:%02x",
+			tmp_count);
+		/*
+		 * Retry once, if that fails bail out and process the
+		 * extracted buffers before trying again.
+		 */
+		if (!retried++)
+			goto again;
+		else
+			return count - tmp_count;
 	}
-	return count - tmp_count;
+
+	DBF_ERROR("%4x EQBS ERROR", SCH_NO(q));
+	DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
+	q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
+		   0, -1, -1, q->irq_ptr->int_parm);
+	return 0;
 }
 
 /**
@@ -197,22 +201,22 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start,
 again:
 	ccq = do_sqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count);
 	rc = qdio_check_ccq(q, ccq);
-	if (rc == 1) {
+	if (!rc) {
+		WARN_ON(tmp_count);
+		return count - tmp_count;
+	}
+
+	if (rc == 1 || rc == 2) {
 		DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "SQBS again:%2d", ccq);
 		qperf_inc(q, sqbs_partial);
 		goto again;
 	}
-	if (rc < 0) {
-		DBF_ERROR("%4x SQBS ERROR", SCH_NO(q));
-		DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
-		q->handler(q->irq_ptr->cdev,
-			   QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
-			   q->nr, q->first_to_kick, count,
-			   q->irq_ptr->int_parm);
-		return 0;
-	}
-	WARN_ON(tmp_count);
-	return count - tmp_count;
+
+	DBF_ERROR("%4x SQBS ERROR", SCH_NO(q));
+	DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
+	q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
+		   0, -1, -1, q->irq_ptr->int_parm);
+	return 0;
 }
 
 /* returns number of examined buffers and their common state in *state */
@@ -277,7 +281,7 @@ static inline int set_buf_state(struct qdio_q *q, int bufnr,
 }
 
 /* set slsb states to initial state */
-void qdio_init_buf_states(struct qdio_irq *irq_ptr)
+static void qdio_init_buf_states(struct qdio_irq *irq_ptr)
 {
 	struct qdio_q *q;
 	int i;
@@ -446,7 +450,7 @@ static void process_buffer_error(struct qdio_q *q, int count)
 		qperf_inc(q, target_full);
 		DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "OUTFULL FTC:%02x",
 			      q->first_to_check);
-		return;
+		goto set;
 	}
 
 	DBF_ERROR("%4x BUF ERROR", SCH_NO(q));
@@ -456,6 +460,7 @@ static void process_buffer_error(struct qdio_q *q, int count)
 		  q->sbal[q->first_to_check]->element[14].sflags,
 		  q->sbal[q->first_to_check]->element[15].sflags);
 
+set:
 	/*
 	 * Interrupts may be avoided as long as the error is present
 	 * so change the buffer state immediately to avoid starvation.
@@ -513,6 +518,8 @@ static int get_inbound_buffer_frontier(struct qdio_q *q)
 	int count, stop;
 	unsigned char state = 0;
 
+	q->timestamp = get_clock_fast();
+
 	/*
 	 * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
 	 * would return 0.
@@ -782,6 +789,8 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
 	int count, stop;
 	unsigned char state = 0;
 
+	q->timestamp = get_clock_fast();
+
 	if (need_siga_sync(q))
 		if (((queue_type(q) != QDIO_IQDIO_QFMT) &&
 		    !pci_out_supported(q)) ||
@@ -912,21 +921,13 @@ static void __qdio_outbound_processing(struct qdio_q *q)
 		if (!pci_out_supported(q) && !qdio_outbound_q_done(q))
 			goto sched;
 
-	/* bail out for HiperSockets unicast queues */
-	if (queue_type(q) == QDIO_IQDIO_QFMT && !multicast_outbound(q))
-		return;
-
-	if ((queue_type(q) == QDIO_IQDIO_QFMT) &&
-	    (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL)
-		goto sched;
-
 	if (q->u.out.pci_out_enabled)
 		return;
 
 	/*
 	 * Now we know that queue type is either qeth without pci enabled
-	 * or HiperSockets multicast. Make sure buffer switch from PRIMED to
-	 * EMPTY is noticed and outbound_handler is called after some time.
+	 * or HiperSockets. Make sure buffer switch from PRIMED to EMPTY
+	 * is noticed and outbound_handler is called after some time.
 	 */
 	if (qdio_outbound_q_done(q))
 		del_timer(&q->u.out.timer);
@@ -1128,7 +1129,6 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
 		return;
 	}
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_QDI]++;
 	if (irq_ptr->perf_stat_enabled)
 		irq_ptr->perf_stat.qdio_int++;
 
@@ -1719,9 +1719,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
 
 	WARN_ON(queue_irqs_enabled(q));
 
-	if (!shared_ind(q))
-		xchg(q->irq_ptr->dsci, 0);
-
+	clear_nonshared_ind(irq_ptr);
 	qdio_stop_polling(q);
 	clear_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state);
 
@@ -1729,7 +1727,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr)
 	 * We need to check again to not lose initiative after
 	 * resetting the ACK state.
 	 */
-	if (!shared_ind(q) && *q->irq_ptr->dsci)
+	if (test_nonshared_ind(irq_ptr))
 		goto rescan;
 	if (!qdio_inbound_q_done(q))
 		goto rescan;
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index a3e3949..011eade 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -26,17 +26,24 @@
  */
 #define TIQDIO_NR_NONSHARED_IND		63
 #define TIQDIO_NR_INDICATORS		(TIQDIO_NR_NONSHARED_IND + 1)
+#define TIQDIO_SHARED_IND		63
+
+/* device state change indicators */
+struct indicator_t {
+	u32 ind;	/* u32 because of compare-and-swap performance */
+	atomic_t count; /* use count, 0 or 1 for non-shared indicators */
+};
 
 /* list of thin interrupt input queues */
 static LIST_HEAD(tiq_list);
-DEFINE_MUTEX(tiq_list_lock);
+static DEFINE_MUTEX(tiq_list_lock);
 
 /* adapter local summary indicator */
 static u8 *tiqdio_alsi;
 
-struct indicator_t *q_indicators;
+static struct indicator_t *q_indicators;
 
-static u64 last_ai_time;
+u64 last_ai_time;
 
 /* returns addr for the device state change indicator */
 static u32 *get_indicator(void)
@@ -90,6 +97,43 @@ void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr)
 	synchronize_rcu();
 }
 
+static inline int has_multiple_inq_on_dsci(struct qdio_irq *irq_ptr)
+{
+	return irq_ptr->nr_input_qs > 1;
+}
+
+static inline int references_shared_dsci(struct qdio_irq *irq_ptr)
+{
+	return irq_ptr->dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
+}
+
+static inline int shared_ind(struct qdio_irq *irq_ptr)
+{
+	return references_shared_dsci(irq_ptr) ||
+		has_multiple_inq_on_dsci(irq_ptr);
+}
+
+void clear_nonshared_ind(struct qdio_irq *irq_ptr)
+{
+	if (!is_thinint_irq(irq_ptr))
+		return;
+	if (shared_ind(irq_ptr))
+		return;
+	xchg(irq_ptr->dsci, 0);
+}
+
+int test_nonshared_ind(struct qdio_irq *irq_ptr)
+{
+	if (!is_thinint_irq(irq_ptr))
+		return 0;
+	if (shared_ind(irq_ptr))
+		return 0;
+	if (*irq_ptr->dsci)
+		return 1;
+	else
+		return 0;
+}
+
 static inline u32 clear_shared_ind(void)
 {
 	if (!atomic_read(&q_indicators[TIQDIO_SHARED_IND].count))
@@ -119,7 +163,7 @@ static inline void tiqdio_call_inq_handlers(struct qdio_irq *irq)
 			q->u.in.queue_start_poll(q->irq_ptr->cdev, q->nr,
 						 q->irq_ptr->int_parm);
 		} else {
-			if (!shared_ind(q))
+			if (!shared_ind(q->irq_ptr))
 				xchg(q->irq_ptr->dsci, 0);
 
 			/*
diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c
index aec60d5..3c2c923 100644
--- a/drivers/s390/kvm/kvm_virtio.c
+++ b/drivers/s390/kvm/kvm_virtio.c
@@ -33,7 +33,7 @@
  * The pointer to our (page) of device descriptions.
  */
 static void *kvm_devices;
-struct work_struct hotplug_work;
+static struct work_struct hotplug_work;
 
 struct kvm_device {
 	struct virtio_device vdev;
@@ -334,10 +334,10 @@ static void scan_devices(void)
  */
 static int match_desc(struct device *dev, void *data)
 {
-	if ((ulong)to_kvmdev(dev_to_virtio(dev))->desc == (ulong)data)
-		return 1;
+	struct virtio_device *vdev = dev_to_virtio(dev);
+	struct kvm_device *kdev = to_kvmdev(vdev);
 
-	return 0;
+	return kdev->desc == data;
 }
 
 /*
diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c
index f1fa248..b41fae3 100644
--- a/drivers/s390/net/claw.c
+++ b/drivers/s390/net/claw.c
@@ -63,7 +63,6 @@
 
 #define KMSG_COMPONENT "claw"
 
-#include <linux/kernel_stat.h>
 #include <asm/ccwdev.h>
 #include <asm/ccwgroup.h>
 #include <asm/debug.h>
@@ -291,6 +290,7 @@ static struct ccw_driver claw_ccw_driver = {
 	.ids	= claw_ids,
 	.probe	= ccwgroup_probe_ccwdev,
 	.remove	= ccwgroup_remove_ccwdev,
+	.int_class = IOINT_CLW,
 };
 
 static ssize_t
@@ -645,7 +645,6 @@ claw_irq_handler(struct ccw_device *cdev,
         struct claw_env  *p_env;
         struct chbk *p_ch_r=NULL;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_CLW]++;
 	CLAW_DBF_TEXT(4, trace, "clawirq");
         /* Bypass all 'unsolicited interrupts' */
 	privptr = dev_get_drvdata(&cdev->dev);
diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
index 426787e..5cb93a8 100644
--- a/drivers/s390/net/ctcm_main.c
+++ b/drivers/s390/net/ctcm_main.c
@@ -24,7 +24,6 @@
 #define KMSG_COMPONENT "ctcm"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
-#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -1203,7 +1202,6 @@ static void ctcm_irq_handler(struct ccw_device *cdev,
 	int cstat;
 	int dstat;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_CTC]++;
 	CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG,
 		"Enter %s(%s)", CTCM_FUNTAIL, dev_name(&cdev->dev));
 
@@ -1769,6 +1767,7 @@ static struct ccw_driver ctcm_ccw_driver = {
 	.ids	= ctcm_ids,
 	.probe	= ccwgroup_probe_ccwdev,
 	.remove	= ccwgroup_remove_ccwdev,
+	.int_class = IOINT_CTC,
 };
 
 static struct ccwgroup_driver ctcm_group_driver = {
diff --git a/drivers/s390/net/ctcm_sysfs.c b/drivers/s390/net/ctcm_sysfs.c
index 8305319..650aec1 100644
--- a/drivers/s390/net/ctcm_sysfs.c
+++ b/drivers/s390/net/ctcm_sysfs.c
@@ -159,7 +159,7 @@ static ssize_t ctcm_proto_store(struct device *dev,
 	return count;
 }
 
-const char *ctcm_type[] = {
+static const char *ctcm_type[] = {
 	"not a channel",
 	"CTC/A",
 	"FICON channel",
diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c
index fb246b94..c28713d 100644
--- a/drivers/s390/net/lcs.c
+++ b/drivers/s390/net/lcs.c
@@ -26,7 +26,6 @@
 #define KMSG_COMPONENT		"lcs"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
-#include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/if.h>
 #include <linux/netdevice.h>
@@ -1399,7 +1398,6 @@ lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
 	int rc, index;
 	int cstat, dstat;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_LCS]++;
 	if (lcs_check_irb_error(cdev, irb))
 		return;
 
@@ -1972,7 +1970,7 @@ lcs_portno_store (struct device *dev, struct device_attribute *attr, const char
 
 static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store);
 
-const char *lcs_type[] = {
+static const char *lcs_type[] = {
 	"not a channel",
 	"2216 parallel",
 	"2216 channel",
@@ -2399,6 +2397,7 @@ static struct ccw_driver lcs_ccw_driver = {
 	.ids	= lcs_ids,
 	.probe	= ccwgroup_probe_ccwdev,
 	.remove	= ccwgroup_remove_ccwdev,
+	.int_class = IOINT_LCS,
 };
 
 /**
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index ce73520..e4c1176 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1415,7 +1415,7 @@ static int qeth_l3_send_checksum_command(struct qeth_card *card)
 	return 0;
 }
 
-int qeth_l3_set_rx_csum(struct qeth_card *card, int on)
+static int qeth_l3_set_rx_csum(struct qeth_card *card, int on)
 {
 	int rc = 0;