USB: testing driver: convert dev->sem to mutex

USB testing driver: convert semaphore dev->sem to the mutex API

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 9 insertions, 8 deletions

diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 81755d06a419..e3851359d653 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -6,6 +6,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/scatterlist.h>
+#include <linux/mutex.h>
 
 #include <linux/usb.h>
 
@@ -64,7 +65,7 @@ struct usbtest_dev {
         int                     in_iso_pipe;
         int                     out_iso_pipe;
         struct usb_endpoint_descriptor  *iso_in, *iso_out;
-        struct semaphore        sem;
+        struct mutex            lock;
 
 #define TBUF_SIZE       256
         u8                      *buf;
@@ -1559,11 +1560,11 @@ usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)
                         || param->sglen < 0 || param->vary < 0)
                 return -EINVAL;
 
-        if (down_interruptible (&dev->sem))
+        if (mutex_lock_interruptible(&dev->lock))
                 return -ERESTARTSYS;
 
         if (intf->dev.power.power_state.event != PM_EVENT_ON) {
-                up (&dev->sem);
+                mutex_unlock(&dev->lock);
                 return -EHOSTUNREACH;
         }
 
@@ -1575,7 +1576,7 @@ usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)
                 int     res;
 
                 if (intf->altsetting->desc.bInterfaceNumber) {
-                        up (&dev->sem);
+                        mutex_unlock(&dev->lock);
                         return -ENODEV;
                 }
                 res = set_altsetting (dev, dev->info->alt);
@@ -1583,7 +1584,7 @@ usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)
                         dev_err (&intf->dev,
                                         "set altsetting to %d failed, %d\n",
                                         dev->info->alt, res);
-                        up (&dev->sem);
+                        mutex_unlock(&dev->lock);
                         return res;
                 }
         }
@@ -1856,7 +1857,7 @@ usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)
                 param->duration.tv_usec += 1000 * 1000;
                 param->duration.tv_sec -= 1;
         }
-        up (&dev->sem);
+        mutex_unlock(&dev->lock);
         return retval;
 }
 
@@ -1906,7 +1907,7 @@ usbtest_probe (struct usb_interface *intf, const struct usb_device_id *id)
                 return -ENOMEM;
         info = (struct usbtest_info *) id->driver_info;
         dev->info = info;
-        init_MUTEX (&dev->sem);
+        mutex_init(&dev->lock);
 
         dev->intf = intf;
 
@@ -1991,7 +1992,7 @@ static void usbtest_disconnect (struct usb_interface *intf)
 {
         struct usbtest_dev      *dev = usb_get_intfdata (intf);
 
-        down (&dev->sem);
+        mutex_lock(&dev->lock);
 
         usb_set_intfdata (intf, NULL);
         dev_dbg (&intf->dev, "disconnect\n");