V4L/DVB (7543): Fix capture start/stop and timeout

Also removes the dead restart_video_queue() function

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index 6049a22..ecc146b 100644 (file)
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -413,12 +413,6 @@ static void em28xx_irq_callback(struct urb *urb)
                        urb->status);
        }
 
-#if 0 /* Bad idea. There are problems that cause a load of valid, but
-        empty, data packets. Don't reset the timeout unless we've actually
-        got a frame. I've had xawtv hang in free_buffer due to this! */
-       if (rc >= 0)
-                       mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
-#endif
        spin_unlock_irqrestore(&dev->slock,flags);
 }
 
@@ -458,7 +452,7 @@ static void em28xx_uninit_isoc(struct em28xx *dev)
 
        dev->isoc_ctl.num_bufs=0;
 
-       // em28xx_capture_start(dev, 0); - FIXME - how could I restart it?
+       em28xx_capture_start(dev, 0);
 }
 
 
@@ -554,6 +548,8 @@ static int em28xx_start_thread( struct em28xx_dmaqueue  *dma_q)
 
        init_waitqueue_head(&dma_q->wq);
 
+       em28xx_capture_start(dev, 1);
+
        /* submit urbs and enables IRQ */
        for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
                rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
@@ -571,7 +567,6 @@ static int em28xx_start_thread( struct em28xx_dmaqueue  *dma_q)
        return 0;
 }
 
-
 static void em28xx_vid_timeout(unsigned long data)
 {
        struct em28xx      *dev  = (struct em28xx*)data;
@@ -589,8 +584,9 @@ static void em28xx_vid_timeout(unsigned long data)
                em28xx_videodbg("em28xx/0: [%p/%d] timeout\n",
                                buf, buf->vb.i);
        }
+       /* Instead of trying to restart, just sets timeout again */
+       mod_timer(&vidq->timeout, jiffies + BUFFER_TIMEOUT);
 
-       /* restart_video_queue(vidq); */
        spin_unlock_irqrestore(&dev->slock,flags);
 }
 
@@ -668,7 +664,6 @@ buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
                if (rc<0)
                        goto fail;
 
-               /* FIXME - should probably be done in response to STREAMON */
                rc = em28xx_start_thread(vidq);
                if (rc<0)
                        goto fail;
@@ -999,7 +994,6 @@ static int vidioc_s_fmt_cap(struct file *file, void *priv,
        get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
 
        em28xx_set_alternate(dev);
-       em28xx_capture_start(dev, 1); /* ??? */
        em28xx_resolution_set(dev);
 
        mutex_unlock(&dev->lock);
@@ -1429,14 +1423,6 @@ static int vidioc_streamon(struct file *file, void *priv,
        if (unlikely(res_get(fh) < 0))
                return -EBUSY;
 
-       /* We can't do this from buffer_queue or anything called from
-          there, since it's called with IRQs disabled and the spinlock held,
-          and this uses USB functions that may sleep
-
-          FIXME FIXME FIXME - putting this here means it may not always
-          be called when it needs to be */
-       em28xx_capture_start(dev, 1);
-
        return (videobuf_streamon(&fh->vb_vidq));
 }