V4L/DVB: gspca - main: Stop the webcam when bandwidth too small

Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 9c9d7ea..e8d08f8 100644 (file)
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -613,6 +613,37 @@ static void destroy_urbs(struct gspca_dev *gspca_dev)
        }
 }
 
+static int gspca_set_alt0(struct gspca_dev *gspca_dev)
+{
+       int ret;
+
+       if (gspca_dev->alt == 0)
+               return 0;
+       ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
+       if (ret < 0)
+               PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
+       return ret;
+}
+
+/* Note: both the queue and the usb locks should be held when calling this */
+static void gspca_stream_off(struct gspca_dev *gspca_dev)
+{
+       gspca_dev->streaming = 0;
+       if (gspca_dev->present) {
+               if (gspca_dev->sd_desc->stopN)
+                       gspca_dev->sd_desc->stopN(gspca_dev);
+               destroy_urbs(gspca_dev);
+               gspca_input_destroy_urb(gspca_dev);
+               gspca_set_alt0(gspca_dev);
+               gspca_input_create_urb(gspca_dev);
+       }
+
+       /* always call stop0 to free the subdriver's resources */
+       if (gspca_dev->sd_desc->stop0)
+               gspca_dev->sd_desc->stop0(gspca_dev);
+       PDEBUG(D_STREAM, "stream off OK");
+}
+
 /*
  * look for an input transfer endpoint in an alternate setting
  */
@@ -838,8 +869,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
                }
                if (ret >= 0)
                        break;
-               gspca_dev->streaming = 0;
-               destroy_urbs(gspca_dev);
+               gspca_stream_off(gspca_dev);
                if (ret != -ENOSPC) {
                        PDEBUG(D_ERR|D_STREAM,
                                "usb_submit_urb alt %d err %d",
@@ -869,37 +899,6 @@ out:
        return ret;
 }
 
-static int gspca_set_alt0(struct gspca_dev *gspca_dev)
-{
-       int ret;
-
-       if (gspca_dev->alt == 0)
-               return 0;
-       ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
-       if (ret < 0)
-               PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
-       return ret;
-}
-
-/* Note: both the queue and the usb locks should be held when calling this */
-static void gspca_stream_off(struct gspca_dev *gspca_dev)
-{
-       gspca_dev->streaming = 0;
-       if (gspca_dev->present) {
-               if (gspca_dev->sd_desc->stopN)
-                       gspca_dev->sd_desc->stopN(gspca_dev);
-               destroy_urbs(gspca_dev);
-               gspca_input_destroy_urb(gspca_dev);
-               gspca_set_alt0(gspca_dev);
-               gspca_input_create_urb(gspca_dev);
-       }
-
-       /* always call stop0 to free the subdriver's resources */
-       if (gspca_dev->sd_desc->stop0)
-               gspca_dev->sd_desc->stop0(gspca_dev);
-       PDEBUG(D_STREAM, "stream off OK");
-}
-
 static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
 {
        int i;