linux-kernel - [PATCH v3 12/12] media: sun6i-isp: params: Unregister pending buffer on cleanup

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Date:   Thu,  8 Dec 2022 15:20:06 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-staging@...ts.linux.dev
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Sakari Ailus <sakari.ailus@....fi>,
        Conor Dooley <conor@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH v3 12/12] media: sun6i-isp: params: Unregister pending buffer on cleanup

The state cleanup helper should unregister the pending buffer from
the state after returning it to v4l2, like it is done for other
buffers in the wait queue.

Before this change, the pending buffer from a previous run might have
been returned at the beginning of the next run, causing an error.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Fixes: e3185e1d7c14 ("media: staging: media: Add support for the Allwinner A31 ISP")
---
 drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_params.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_params.c b/drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_params.c
index 7b41a13162b9..e28be895b486 100644
--- a/drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_params.c
+++ b/drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_params.c
@@ -208,6 +208,8 @@ static void sun6i_isp_params_state_cleanup(struct sun6i_isp_device *isp_dev,
 		vb2_buffer = &state->pending->v4l2_buffer.vb2_buf;
 		vb2_buffer_done(vb2_buffer, error ? VB2_BUF_STATE_ERROR :
 				VB2_BUF_STATE_QUEUED);
+
+		state->pending = NULL;
 	}
 
 	list_for_each_entry(isp_buffer, &state->queue, list) {
-- 
2.38.1