Merge tag 'char-misc-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver patches from Greg KH:
 "Here's the big char/misc driver updates for 3.15-rc1.

  Lots of various things here, including the new mcb driver subsystem.

  All of these have been in linux-next for a while"

* tag 'char-misc-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (118 commits)
  extcon: Move OF helper function to extcon core and change function name
  extcon: of: Remove unnecessary function call by using the name of device_node
  extcon: gpio: Use SIMPLE_DEV_PM_OPS macro
  extcon: palmas: Use SIMPLE_DEV_PM_OPS macro
  mei: don't use deprecated DEFINE_PCI_DEVICE_TABLE macro
  mei: amthif: fix checkpatch error
  mei: client.h fix checkpatch errors
  mei: use cl_dbg where appropriate
  mei: fix Unnecessary space after function pointer name
  mei: report consistently copy_from/to_user failures
  mei: drop pr_fmt macros
  mei: make me hw headers private to me hw.
  mei: fix memory leak of pending write cb objects
  mei: me: do not reset when less than expected data is received
  drivers: mcb: Fix build error discovered by 0-day bot
  cs5535-mfgpt: Simplify dependencies
  spmi: pm: drop bus-level PM suspend/resume routines
  spmi: pmic_arb: make selectable on ARCH_QCOM
  Drivers: hv: vmbus: Increase the limit on the number of pfns we can handle
  pch_phub: Report error writing MAC back to user
  ...

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index a3ae154..ced5b77 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -75,6 +75,54 @@ static const struct file_operations mei_dbgfs_fops_meclients = {
 	.llseek = generic_file_llseek,
 };
 
+static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
+					size_t cnt, loff_t *ppos)
+{
+	struct mei_device *dev = fp->private_data;
+	struct mei_cl *cl;
+	const size_t bufsz = 1024;
+	char *buf;
+	int i = 0;
+	int pos = 0;
+	int ret;
+
+	if (!dev)
+		return -ENODEV;
+
+	buf = kzalloc(bufsz, GFP_KERNEL);
+	if  (!buf)
+		return -ENOMEM;
+
+	pos += scnprintf(buf + pos, bufsz - pos,
+			"  |me|host|state|rd|wr|\n");
+
+	mutex_lock(&dev->device_lock);
+
+	/*  if the driver is not enabled the list won't b consitent */
+	if (dev->dev_state != MEI_DEV_ENABLED)
+		goto out;
+
+	list_for_each_entry(cl, &dev->file_list, link) {
+
+		pos += scnprintf(buf + pos, bufsz - pos,
+			"%2d|%2d|%4d|%5d|%2d|%2d|\n",
+			i, cl->me_client_id, cl->host_client_id, cl->state,
+			cl->reading_state, cl->writing_state);
+		i++;
+	}
+out:
+	mutex_unlock(&dev->device_lock);
+	ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+	kfree(buf);
+	return ret;
+}
+
+static const struct file_operations mei_dbgfs_fops_active = {
+	.open = simple_open,
+	.read = mei_dbgfs_read_active,
+	.llseek = generic_file_llseek,
+};
+
 static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
 					size_t cnt, loff_t *ppos)
 {
@@ -128,6 +176,12 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name)
 		dev_err(&dev->pdev->dev, "meclients: registration failed\n");
 		goto err;
 	}
+	f = debugfs_create_file("active", S_IRUSR, dir,
+				dev, &mei_dbgfs_fops_active);
+	if (!f) {
+		dev_err(&dev->pdev->dev, "meclients: registration failed\n");
+		goto err;
+	}
 	f = debugfs_create_file("devstate", S_IRUSR, dir,
 				dev, &mei_dbgfs_fops_devstate);
 	if (!f) {