1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/media/usb/gspca/zc3xx.c b/drivers/media/usb/gspca/zc3xx.c
index 234d9eaa8eea..c47ba14c7619 100644
--- a/drivers/media/usb/gspca/zc3xx.c
+++ b/drivers/media/usb/gspca/zc3xx.c
@@ -5945,6 +5945,7 @@ static void transfer_update(struct work_struct *work)
         for (;;) {
                 msleep(100);
 
+                /* To protect gspca_dev->usb_buf and gspca_dev->usb_err */
                 mutex_lock(&gspca_dev->usb_lock);
 #ifdef CONFIG_PM
                 if (gspca_dev->frozen)
@@ -6831,7 +6832,8 @@ static int sd_start(struct gspca_dev *gspca_dev)
         return 0;
 }
 
-/* called on streamoff with alt 0 and on disconnect */
+/* called on streamoff with alt==0 and on disconnect */
+/* the usb_lock is held at entry - restore on exit */
 static void sd_stop0(struct gspca_dev *gspca_dev)
 {
         struct sd *sd = (struct sd *) gspca_dev;