linux-kernel - [PATCH v15 26/56] media: i2c: video-i2c: Stop direct calls to queue num

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Message-Id: <20231109163512.179524-27-benjamin.gaignard@collabora.com>
Date:   Thu,  9 Nov 2023 17:34:42 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     mchehab@...nel.org, tfiga@...omium.org, m.szyprowski@...sung.com,
        ming.qian@....com, ezequiel@...guardiasur.com.ar,
        p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
        hverkuil-cisco@...all.nl, nicolas.dufresne@...labora.com
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
        kernel@...labora.com,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Matt Ranostay <matt.ranostay@...sulko.com>
Subject: [PATCH v15 26/56] media: i2c: video-i2c: Stop direct calls to queue num_buffers field

Use vb2_get_num_buffers() to avoid using queue num_buffers field directly.
This allows us to change how the number of buffers is computed in the
future.
Fix the number of buffers computation at the same time.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
CC: Matt Ranostay <matt.ranostay@...sulko.com>
---
 drivers/media/i2c/video-i2c.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/video-i2c.c b/drivers/media/i2c/video-i2c.c
index 178bd06cc2ed..ebf2ac98a068 100644
--- a/drivers/media/i2c/video-i2c.c
+++ b/drivers/media/i2c/video-i2c.c
@@ -405,9 +405,10 @@ static int queue_setup(struct vb2_queue *vq,
 {
 	struct video_i2c_data *data = vb2_get_drv_priv(vq);
 	unsigned int size = data->chip->buffer_size;
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 
-	if (vq->num_buffers + *nbuffers < 2)
-		*nbuffers = 2;
+	if (q_num_bufs + *nbuffers < 2)
+		*nbuffers = 2 - q_num_bufs;
 
 	if (*nplanes)
 		return sizes[0] < size ? -EINVAL : 0;
-- 
2.39.2