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| author | Hans de Goede <hdegoede@redhat.com> | 2010-12-30 20:00:17 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-01-19 11:44:55 -0200 |
| commit | 4a82bc60a9abbfca0c899366ff30c592e8020520 (patch) | |
| tree | 3821b98f8a5b92d09b56f448ea33e195e19cbeeb /drivers | |
| parent | 27074efa2ee8c1ef07dc5f644104e35d39e43322 (diff) | |
| download | linux-3.10-4a82bc60a9abbfca0c899366ff30c592e8020520.tar.gz linux-3.10-4a82bc60a9abbfca0c899366ff30c592e8020520.tar.bz2 linux-3.10-4a82bc60a9abbfca0c899366ff30c592e8020520.zip | |
[media] gspca_main: Update buffer flags even when user_copy fails
Before this patch dqbuf errors out on a failing user_copy (with user pointers)
before updating the buffer flags, causing a successsfully dequeued buffer
to still have the DONE flag, which means that it could no longer be
re-queueud (assuming the app somehow survives the segfault).
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/gspca/gspca.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index 64ecf669d65..fbc5666ee29 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -1912,6 +1912,11 @@ static int vidioc_dqbuf(struct file *file, void *priv, mutex_unlock(&gspca_dev->usb_lock); } + frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; + memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); + PDEBUG(D_FRAM, "dqbuf %d", j); + ret = 0; + if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, frame->data, @@ -1919,13 +1924,8 @@ static int vidioc_dqbuf(struct file *file, void *priv, PDEBUG(D_ERR|D_STREAM, "dqbuf cp to user failed"); ret = -EFAULT; - goto out; } } - frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; - memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); - PDEBUG(D_FRAM, "dqbuf %d", j); - ret = 0; out: mutex_unlock(&gspca_dev->queue_lock); return ret; |