[PATCH] USB: convert a bunch of USB semaphores to mutexes

the patch below converts a bunch of semaphores-used-as-mutex in the USB
code to mutexes

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 14 insertions, 14 deletions

diff --git a/drivers/usb/media/usbvideo.c b/drivers/usb/media/usbvideo.c
index 63d279ec722b..0b51fae720a9 100644
--- a/drivers/usb/media/usbvideo.c
+++ b/drivers/usb/media/usbvideo.c
@@ -714,7 +714,7 @@ int usbvideo_register(
         cams->md_module = md;
         if (cams->md_module == NULL)
                 warn("%s: module == NULL!", __FUNCTION__);
-        init_MUTEX(&cams->lock);        /* to 1 == available */
+        mutex_init(&cams->lock);        /* to 1 == available */
 
         for (i = 0; i < num_cams; i++) {
                 struct uvd *up = &cams->cam[i];
@@ -862,7 +862,7 @@ static void usbvideo_Disconnect(struct usb_interface *intf)
         if (uvd->debug > 0)
                 info("%s(%p.)", __FUNCTION__, intf);
 
-        down(&uvd->lock);
+        mutex_lock(&uvd->lock);
         uvd->remove_pending = 1; /* Now all ISO data will be ignored */
 
         /* At this time we ask to cancel outstanding URBs */
@@ -882,7 +882,7 @@ static void usbvideo_Disconnect(struct usb_interface *intf)
                 info("%s: In use, disconnect pending.", __FUNCTION__);
         else
                 usbvideo_CameraRelease(uvd);
-        up(&uvd->lock);
+        mutex_unlock(&uvd->lock);
         info("USB camera disconnected.");
 
         usbvideo_ClientDecModCount(uvd);
@@ -929,19 +929,19 @@ static int usbvideo_find_struct(struct usbvideo *cams)
                 err("No usbvideo handle?");
                 return -1;
         }
-        down(&cams->lock);
+        mutex_lock(&cams->lock);
         for (u = 0; u < cams->num_cameras; u++) {
                 struct uvd *uvd = &cams->cam[u];
                 if (!uvd->uvd_used) /* This one is free */
                 {
                         uvd->uvd_used = 1;      /* In use now */
-                        init_MUTEX(&uvd->lock); /* to 1 == available */
+                        mutex_init(&uvd->lock); /* to 1 == available */
                         uvd->dev = NULL;
                         rv = u;
                         break;
                 }
         }
-        up(&cams->lock);
+        mutex_unlock(&cams->lock);
         return rv;
 }
 
@@ -983,7 +983,7 @@ struct uvd *usbvideo_AllocateDevice(struct usbvideo *cams)
         /* Not relying upon caller we increase module counter ourselves */
         usbvideo_ClientIncModCount(uvd);
 
-        down(&uvd->lock);
+        mutex_lock(&uvd->lock);
         for (i=0; i < USBVIDEO_NUMSBUF; i++) {
                 uvd->sbuf[i].urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
                 if (uvd->sbuf[i].urb == NULL) {
@@ -1006,7 +1006,7 @@ struct uvd *usbvideo_AllocateDevice(struct usbvideo *cams)
          * return control to the client's probe function right now.
          */
 allocate_done:
-        up (&uvd->lock);
+        mutex_unlock(&uvd->lock);
         usbvideo_ClientDecModCount(uvd);
         return uvd;
 }
@@ -1120,7 +1120,7 @@ static int usbvideo_v4l_open(struct inode *inode, struct file *file)
                 info("%s($%p)", __FUNCTION__, dev);
 
         usbvideo_ClientIncModCount(uvd);
-        down(&uvd->lock);
+        mutex_lock(&uvd->lock);
 
         if (uvd->user) {
                 err("%s: Someone tried to open an already opened device!", __FUNCTION__);
@@ -1201,7 +1201,7 @@ static int usbvideo_v4l_open(struct inode *inode, struct file *file)
                         }
                 }
         }
-        up(&uvd->lock);
+        mutex_unlock(&uvd->lock);
         if (errCode != 0)
                 usbvideo_ClientDecModCount(uvd);
         if (uvd->debug > 0)
@@ -1230,7 +1230,7 @@ static int usbvideo_v4l_close(struct inode *inode, struct file *file)
         if (uvd->debug > 1)
                 info("%s($%p)", __FUNCTION__, dev);
 
-        down(&uvd->lock);
+        mutex_lock(&uvd->lock);
         GET_CALLBACK(uvd, stopDataPump)(uvd);
         usbvideo_rvfree(uvd->fbuf, uvd->fbuf_size);
         uvd->fbuf = NULL;
@@ -1251,7 +1251,7 @@ static int usbvideo_v4l_close(struct inode *inode, struct file *file)
                         info("usbvideo_v4l_close: Final disconnect.");
                 usbvideo_CameraRelease(uvd);
         }
-        up(&uvd->lock);
+        mutex_unlock(&uvd->lock);
         usbvideo_ClientDecModCount(uvd);
 
         if (uvd->debug > 1)
@@ -1511,7 +1511,7 @@ static ssize_t usbvideo_v4l_read(struct file *file, char __user *buf,
         if (uvd->debug >= 1)
                 info("%s: %Zd. bytes, noblock=%d.", __FUNCTION__, count, noblock);
 
-        down(&uvd->lock);       
+        mutex_lock(&uvd->lock);
 
         /* See if a frame is completed, then use it. */
         for(i = 0; i < USBVIDEO_NUMFRAMES; i++) {
@@ -1643,7 +1643,7 @@ static ssize_t usbvideo_v4l_read(struct file *file, char __user *buf,
                 }
         }
 read_done:
-        up(&uvd->lock); 
+        mutex_unlock(&uvd->lock);
         return count;
 }