usb: remove libusual

The "Low Performance USB Block driver" has been removed which a user of
libusual. Now we have only the usb-storage driver as the only driver in
tree. This makes libusual needless.
This patch removes libusal, fixes up all users. The usual-table is now
linked into usb-storage.
usb_usual.h remains in public include directory because some staging
users seem to need it.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 243 deletions

diff --git a/drivers/usb/storage/libusual.c b/drivers/usb/storage/libusual.c
deleted file mode 100644
index fe3ffe1..0000000
--- a/drivers/usb/storage/libusual.c
+++ /dev/null
@@ -1,243 +0,0 @@
-/*
- * libusual
- *
- * The libusual contains the table of devices common for ub and usb-storage.
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/usb.h>
-#include <linux/usb_usual.h>
-#include <linux/vmalloc.h>
-#include <linux/kthread.h>
-#include <linux/mutex.h>
-
-/*
- */
-#define USU_MOD_FL_THREAD   1	/* Thread is running */
-#define USU_MOD_FL_PRESENT  2	/* The module is loaded */
-
-struct mod_status {
-	unsigned long fls;
-};
-
-static struct mod_status stat[3];
-static DEFINE_SPINLOCK(usu_lock);
-
-/*
- */
-#define USB_US_DEFAULT_BIAS	USB_US_TYPE_STOR
-static atomic_t usu_bias = ATOMIC_INIT(USB_US_DEFAULT_BIAS);
-
-#define BIAS_NAME_SIZE  (sizeof("usb-storage"))
-static const char *bias_names[3] = { "none", "usb-storage", "ub" };
-
-static DEFINE_MUTEX(usu_probe_mutex);
-static DECLARE_COMPLETION(usu_end_notify);
-static atomic_t total_threads = ATOMIC_INIT(0);
-
-static int usu_probe_thread(void *arg);
-
-/*
- * @type: the module type as an integer
- */
-void usb_usual_set_present(int type)
-{
-	struct mod_status *st;
-	unsigned long flags;
-
-	if (type <= 0 || type >= 3)
-		return;
-	st = &stat[type];
-	spin_lock_irqsave(&usu_lock, flags);
-	st->fls |= USU_MOD_FL_PRESENT;
-	spin_unlock_irqrestore(&usu_lock, flags);
-}
-EXPORT_SYMBOL_GPL(usb_usual_set_present);
-
-void usb_usual_clear_present(int type)
-{
-	struct mod_status *st;
-	unsigned long flags;
-
-	if (type <= 0 || type >= 3)
-		return;
-	st = &stat[type];
-	spin_lock_irqsave(&usu_lock, flags);
-	st->fls &= ~USU_MOD_FL_PRESENT;
-	spin_unlock_irqrestore(&usu_lock, flags);
-}
-EXPORT_SYMBOL_GPL(usb_usual_clear_present);
-
-/*
- * Match the calling driver type against the table.
- * Returns: 0 if the device matches.
- */
-int usb_usual_check_type(const struct usb_device_id *id, int caller_type)
-{
-	int id_type = USB_US_TYPE(id->driver_info);
-
-	if (caller_type <= 0 || caller_type >= 3)
-		return -EINVAL;
-
-	/* Drivers grab fixed assignment devices */
-	if (id_type == caller_type)
-		return 0;
-	/* Drivers grab devices biased to them */
-	if (id_type == USB_US_TYPE_NONE && caller_type == atomic_read(&usu_bias))
-		return 0;
-	return -ENODEV;
-}
-EXPORT_SYMBOL_GPL(usb_usual_check_type);
-
-/*
- */
-static int usu_probe(struct usb_interface *intf,
-			 const struct usb_device_id *id)
-{
-	int rc;
-	unsigned long type;
-	struct task_struct* task;
-	unsigned long flags;
-
-	type = USB_US_TYPE(id->driver_info);
-	if (type == 0)
-		type = atomic_read(&usu_bias);
-
-	spin_lock_irqsave(&usu_lock, flags);
-	if ((stat[type].fls & (USU_MOD_FL_THREAD|USU_MOD_FL_PRESENT)) != 0) {
-		spin_unlock_irqrestore(&usu_lock, flags);
-		return -ENXIO;
-	}
-	stat[type].fls |= USU_MOD_FL_THREAD;
-	spin_unlock_irqrestore(&usu_lock, flags);
-
-	task = kthread_run(usu_probe_thread, (void*)type, "libusual_%ld", type);
-	if (IS_ERR(task)) {
-		rc = PTR_ERR(task);
-		printk(KERN_WARNING "libusual: "
-		    "Unable to start the thread for %s: %d\n",
-		    bias_names[type], rc);
-		spin_lock_irqsave(&usu_lock, flags);
-		stat[type].fls &= ~USU_MOD_FL_THREAD;
-		spin_unlock_irqrestore(&usu_lock, flags);
-		return rc;	/* Not being -ENXIO causes a message printed */
-	}
-	atomic_inc(&total_threads);
-
-	return -ENXIO;
-}
-
-static void usu_disconnect(struct usb_interface *intf)
-{
-	;	/* We should not be here. */
-}
-
-static struct usb_driver usu_driver = {
-	.name =		"libusual",
-	.probe =	usu_probe,
-	.disconnect =	usu_disconnect,
-	.id_table =	usb_storage_usb_ids,
-};
-
-/*
- * A whole new thread for a purpose of request_module seems quite stupid.
- * The request_module forks once inside again. However, if we attempt
- * to load a storage module from our own modprobe thread, that module
- * references our symbols, which cannot be resolved until our module is
- * initialized. I wish there was a way to wait for the end of initialization.
- * The module notifier reports MODULE_STATE_COMING only.
- * So, we wait until module->init ends as the next best thing.
- */
-static int usu_probe_thread(void *arg)
-{
-	int type = (unsigned long) arg;
-	struct mod_status *st = &stat[type];
-	int rc;
-	unsigned long flags;
-
-	mutex_lock(&usu_probe_mutex);
-	rc = request_module(bias_names[type]);
-	spin_lock_irqsave(&usu_lock, flags);
-	if (rc == 0 && (st->fls & USU_MOD_FL_PRESENT) == 0) {
-		/*
-		 * This should not happen, but let us keep tabs on it.
-		 */
-		printk(KERN_NOTICE "libusual: "
-		    "modprobe for %s succeeded, but module is not present\n",
-		    bias_names[type]);
-	}
-	st->fls &= ~USU_MOD_FL_THREAD;
-	spin_unlock_irqrestore(&usu_lock, flags);
-	mutex_unlock(&usu_probe_mutex);
-
-	complete_and_exit(&usu_end_notify, 0);
-}
-
-/*
- */
-static int __init usb_usual_init(void)
-{
-	int rc;
-
-	mutex_lock(&usu_probe_mutex);
-	rc = usb_register(&usu_driver);
-	mutex_unlock(&usu_probe_mutex);
-	return rc;
-}
-
-static void __exit usb_usual_exit(void)
-{
-	/*
-	 * We do not check for any drivers present, because
-	 * they keep us pinned with symbol references.
-	 */
-
-	usb_deregister(&usu_driver);
-
-	while (atomic_read(&total_threads) > 0) {
-		wait_for_completion(&usu_end_notify);
-		atomic_dec(&total_threads);
-	}
-}
-
-/*
- * Validate and accept the bias parameter.
- */
-static int usu_set_bias(const char *bias_s, struct kernel_param *kp)
-{
-	int i;
-	int len;
-	int bias_n = 0;
-
-	len = strlen(bias_s);
-	if (len == 0)
-		return -EDOM;
-	if (bias_s[len-1] == '\n')
-		--len;
-
-	for (i = 1; i < 3; i++) {
-		if (strncmp(bias_s, bias_names[i], len) == 0) {
-			bias_n = i;
-			break;
-		}
-	}
-	if (bias_n == 0)
-		return -EINVAL;
-
-	atomic_set(&usu_bias, bias_n);
-	return 0;
-}
-
-static int usu_get_bias(char *buffer, struct kernel_param *kp)
-{
-	return strlen(strcpy(buffer, bias_names[atomic_read(&usu_bias)]));
-}
-
-module_init(usb_usual_init);
-module_exit(usb_usual_exit);
-
-module_param_call(bias, usu_set_bias, usu_get_bias, NULL, S_IRUGO|S_IWUSR);
-__MODULE_PARM_TYPE(bias, "string");
-MODULE_PARM_DESC(bias, "Bias to usb-storage or ub");
-
-MODULE_LICENSE("GPL");