[media] stk1160: Stop device and unqueue buffers when start_streaming() fails

If start_streaming() fails (e.g. out of memory) the driver needs to
rewind the start procedure. This implies possibly stopping the device
and clearing the buffer queue.

Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/usb/stk1160/stk1160-v4l.c b/drivers/media/usb/stk1160/stk1160-v4l.c
index 879800d..fe6e857 100644 (file)
--- a/drivers/media/usb/stk1160/stk1160-v4l.c
+++ b/drivers/media/usb/stk1160/stk1160-v4l.c
@@ -184,7 +184,7 @@ static int stk1160_start_streaming(struct stk1160 *dev)
        if (!dev->isoc_ctl.num_bufs || new_pkt_size) {
                rc = stk1160_alloc_isoc(dev);
                if (rc < 0)
-                       goto out_unlock;
+                       goto out_stop_hw;
        }
 
        /* submit urbs and enables IRQ */
@@ -192,8 +192,7 @@ static int stk1160_start_streaming(struct stk1160 *dev)
                rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_KERNEL);
                if (rc) {
                        stk1160_err("cannot submit urb[%d] (%d)\n", i, rc);
-                       stk1160_uninit_isoc(dev);
-                       goto out_unlock;
+                       goto out_uninit;
                }
        }
 
@@ -206,7 +205,16 @@ static int stk1160_start_streaming(struct stk1160 *dev)
 
        stk1160_dbg("streaming started\n");
 
-out_unlock:
+       mutex_unlock(&dev->v4l_lock);
+
+       return 0;
+
+out_uninit:
+       stk1160_uninit_isoc(dev);
+out_stop_hw:
+       usb_set_interface(dev->udev, 0, 0);
+       stk1160_clear_queue(dev);
+
        mutex_unlock(&dev->v4l_lock);
 
        return rc;