V4L/DVB (10327): em28xx: Add check before call em28xx_isoc_audio_deinit()

Just call em28xx_isoc_audio_deinit() if em28xx sent a usb_submit().

Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c
index 7a62c77..43e8d7d 100644 (file)
--- a/drivers/media/video/em28xx/em28xx-audio.c
+++ b/drivers/media/video/em28xx/em28xx-audio.c
@@ -61,7 +61,7 @@ static int em28xx_isoc_audio_deinit(struct em28xx *dev)
        int i;
 
        dprintk("Stopping isoc\n");
-       for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
+       for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
                if (!irqs_disabled())
                        usb_kill_urb(dev->adev.urb[i]);
                else
@@ -73,6 +73,7 @@ static int em28xx_isoc_audio_deinit(struct em28xx *dev)
                dev->adev.transfer_buffer[i] = NULL;
        }
 
+       dev->isoc_ctl.num_bufs = 0;
        return 0;
 }
 
@@ -156,6 +157,8 @@ static int em28xx_init_audio_isoc(struct em28xx *dev)
 
        dprintk("Starting isoc transfers\n");
 
+       dev->isoc_ctl.num_bufs = 0;
+
        for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
                struct urb *urb;
                int j, k;
@@ -197,10 +200,19 @@ static int em28xx_init_audio_isoc(struct em28xx *dev)
        for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
                errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
                if (errCode) {
-                       em28xx_isoc_audio_deinit(dev);
+                       if (dev->isoc_ctl.num_bufs == 0) {
+                               usb_free_urb(dev->adev.urb[i]);
+                               dev->adev.urb[i] = NULL;
+                               kfree(dev->adev.transfer_buffer[i]);
+                               dev->adev.transfer_buffer[i] = NULL;
+                       } else
+                               em28xx_isoc_audio_deinit(dev);
 
                        return errCode;
                }
+               mutex_lock(&dev->lock);
+               dev->isoc_ctl.num_bufs++;
+               mutex_unlock(&dev->lock);
        }
 
        return 0;