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media: videobuf2-v4l2: drop WARN_ON in vb2_warn_zero_bytesused()

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commit 5e99456c20 upstream.

Userspace shouldn't set bytesused to 0 for output buffers.
vb2_warn_zero_bytesused() warns about this (only once!), but it also
calls WARN_ON(1), which is confusing since it is not immediately clear
that it warns about a 0 value for bytesused.

Just drop the WARN_ON as it serves no purpose.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Matthias Maennich <maennich@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans Verkuil 2018-11-19 10:33:44 -05:00 committed by Greg Kroah-Hartman
parent f5fd34f057
commit 7f422aa63d
1 changed files with 0 additions and 1 deletions
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drivers/media/v4l2-core/videobuf2-v4l2.c
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@ -146,7 +146,6 @@ static void vb2_warn_zero_bytesused(struct vb2_buffer *vb)
return;
check_once = true;
WARN_ON(1);
pr_warn("use of bytesused == 0 is deprecated and will be removed in the future,\n");
if (vb->vb2_queue->allow_zero_bytesused)