linux-kernel - [PATCH v7 18/49] media: Remove duplicated index vs q->num

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Message-Id: <20230914133323.198857-19-benjamin.gaignard@collabora.com>
Date:   Thu, 14 Sep 2023 15:32:52 +0200
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>
Subject: [PATCH v7 18/49] media: Remove duplicated index vs q->num_buffers check

vb2_get_buffer() already check if the requested index is valid.
Stop duplicating this kind of check everywhere.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
---
 drivers/media/common/videobuf2/videobuf2-core.c |  8 ++++++++
 drivers/media/common/videobuf2/videobuf2-v4l2.c | 13 -------------
 include/media/videobuf2-core.h                  |  8 +-------
 3 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index ee4df7c68397..2add7a6795e7 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -660,6 +660,14 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
 	}
 }
 
+struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q, unsigned int index)
+{
+	if (index < q->num_buffers)
+		return q->bufs[index];
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(vb2_get_buffer);
+
 bool vb2_buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb)
 {
 	unsigned int plane;
diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
index 87c2d5916960..f10b70d8e66a 100644
--- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
+++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
@@ -378,11 +378,6 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *md
 		return -EINVAL;
 	}
 
-	if (b->index >= q->num_buffers) {
-		dprintk(q, 1, "%s: buffer index out of range\n", opname);
-		return -EINVAL;
-	}
-
 	vb = vb2_get_buffer(q, b->index);
 	if (!vb) {
 		dprintk(q, 1, "%s: buffer is NULL\n", opname);
@@ -829,10 +824,6 @@ int vb2_qbuf(struct vb2_queue *q, struct media_device *mdev,
 		return -EBUSY;
 	}
 
-	if (b->index >= q->num_buffers) {
-		dprintk(q, 1, "buffer index out of range\n");
-		return -EINVAL;
-	}
 	vb = vb2_get_buffer(q, b->index);
 	if (!vb) {
 		dprintk(q, 1, "can't find the requested buffer\n");
@@ -904,10 +895,6 @@ int vb2_expbuf(struct vb2_queue *q, struct v4l2_exportbuffer *eb)
 {
 	struct vb2_buffer *vb;
 
-	if (eb->index >= q->num_buffers) {
-		dprintk(q, 1, "buffer index out of range\n");
-		return -EINVAL;
-	}
 	vb = vb2_get_buffer(q, eb->index);
 	if (!vb) {
 		dprintk(q, 1, "can't find the requested buffer\n");
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 97153c69583f..25ca395616a7 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -1238,13 +1238,7 @@ static inline void vb2_clear_last_buffer_dequeued(struct vb2_queue *q)
  * operation, so the buffer lifetime should be taken into
  * consideration.
  */
-static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q,
-						unsigned int index)
-{
-	if (index < q->num_buffers)
-		return q->bufs[index];
-	return NULL;
-}
+struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q, unsigned int index);
 
 /*
  * The following functions are not part of the vb2 core API, but are useful
-- 
2.39.2