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media: cobalt: replace VB2_BUF_STATE_REQUEUEING by _ERROR

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The cobalt driver is the only driver that uses VB2_BUF_STATE_REQUEUEING.
Replace it by VB2_BUF_STATE_ERROR so we can drop support for the
REQUEUEING state.

The requeueing state was used in the cobalt driver to optimize
buffer handling while waiting for a valid signal: by requeueing
buffers internally there was no need for userspace to handle and
requeue buffers with the ERROR flag set.

However, requeueing also makes the buffer handling unordered, which
is generally a bad idea. Requeueing also does not work with requests
and any future fence support.

Since it is really a minor optimization in the cobalt driver it is
best to just return the buffer in an ERROR state. With this change
support for requeueing can now be removed in vb2.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil 2019-02-28 07:35:45 -05:00 committed by Mauro Carvalho Chehab
parent b3ce6f6ff3
commit 0cd25448a1
1 changed files with 1 additions and 1 deletions
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2
drivers/media/pci/cobalt/cobalt-irq.c
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@ -128,7 +128,7 @@ static void cobalt_dma_stream_queue_handler(struct cobalt_stream *s)
cb->vb.sequence = s->sequence++;
vb2_buffer_done(&cb->vb.vb2_buf,
(skip || s->unstable_frame) ?
VB2_BUF_STATE_REQUEUEING : VB2_BUF_STATE_DONE);
VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
}
irqreturn_t cobalt_irq_handler(int irq, void *dev_id)