V4L/DVB (11712): gspca - main: Set the current alternate setting only when needed

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

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index efa4dd349f60..ebeae6bdacc8 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -486,7 +486,7 @@ static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
         }
         PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
                         i, ep->desc.bEndpointAddress);
-        if (i > 0) {
+        if (gspca_dev->nbalt > 1) {
                 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
                 if (ret < 0) {
                         err("set alt %d err %d", i, ret);
@@ -653,6 +653,8 @@ 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);