diff options
Diffstat (limited to 'drivers/media/video/gspca/gspca.c')
| -rw-r--r-- | drivers/media/video/gspca/gspca.c | 40 |
1 files changed, 12 insertions, 28 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index 7f8b798deb1b..e77cc19be4ec 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -300,7 +300,6 @@ struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, frame->v4l2_buf.bytesused = frame->data_end - frame->data; frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; - atomic_inc(&gspca_dev->nevent); wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; gspca_dev->fr_i = i; @@ -394,7 +393,6 @@ static int frame_alloc(struct gspca_dev *gspca_dev, gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; gspca_dev->last_packet_type = DISCARD_PACKET; gspca_dev->sequence = 0; - atomic_set(&gspca_dev->nevent, 0); return 0; } @@ -628,7 +626,6 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev) goto out; } gspca_dev->streaming = 1; - atomic_set(&gspca_dev->nevent, 0); /* some bulk transfers are started by the subdriver */ if (gspca_dev->alt == 0 && gspca_dev->cam.bulk_nurbs == 0) @@ -669,7 +666,6 @@ static int gspca_set_alt0(struct gspca_dev *gspca_dev) static void gspca_stream_off(struct gspca_dev *gspca_dev) { gspca_dev->streaming = 0; - atomic_set(&gspca_dev->nevent, 0); if (gspca_dev->present && gspca_dev->sd_desc->stopN) gspca_dev->sd_desc->stopN(gspca_dev); @@ -1255,7 +1251,6 @@ static int vidioc_streamoff(struct file *file, void *priv, gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; gspca_dev->last_packet_type = DISCARD_PACKET; gspca_dev->sequence = 0; - atomic_set(&gspca_dev->nevent, 0); ret = 0; out: mutex_unlock(&gspca_dev->queue_lock); @@ -1459,33 +1454,22 @@ static int frame_wait(struct gspca_dev *gspca_dev, i = gspca_dev->fr_o; j = gspca_dev->fr_queue[i]; frame = &gspca_dev->frame[j]; - if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) { - atomic_dec(&gspca_dev->nevent); - goto ok; - } - if (nonblock_ing) /* no frame yet */ - return -EAGAIN; - /* wait till a frame is ready */ - for (;;) { + if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) { + if (nonblock_ing) + return -EAGAIN; + + /* wait till a frame is ready */ ret = wait_event_interruptible_timeout(gspca_dev->wq, - atomic_read(&gspca_dev->nevent) > 0, - msecs_to_jiffies(3000)); - if (ret <= 0) { - if (ret < 0) - return ret; /* interrupt */ - return -EIO; /* timeout */ - } - atomic_dec(&gspca_dev->nevent); - if (!gspca_dev->streaming || !gspca_dev->present) + (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) || + !gspca_dev->streaming || !gspca_dev->present, + msecs_to_jiffies(3000)); + if (ret < 0) + return ret; + if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present) return -EIO; - i = gspca_dev->fr_o; - j = gspca_dev->fr_queue[i]; - frame = &gspca_dev->frame[j]; - if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) - break; } -ok: + gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", gspca_dev->fr_q, |