linux-kernel - [PATCH AUTOSEL 4.19 12/16] media: videobuf2-core: clear memory related fields in __vb2_plane_dmabuf

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Message-ID: <20241004183150.3676355-12-sashal@kernel.org>
Date: Fri,  4 Oct 2024 14:31:39 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Yunke Cao <yunkec@...omium.org>,
	Tomasz Figa <tfiga@...omium.org>,
	Hans Verkuil <hverkuil-cisco@...all.nl>,
	Sasha Levin <sashal@...nel.org>,
	m.szyprowski@...sung.com,
	mchehab@...nel.org,
	linux-media@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 12/16] media: videobuf2-core: clear memory related fields in __vb2_plane_dmabuf_put()

From: Yunke Cao <yunkec@...omium.org>

[ Upstream commit 6a9c97ab6b7e85697e0b74e86062192a5ffffd99 ]

Clear vb2_plane's memory related fields in __vb2_plane_dmabuf_put(),
including bytesused, length, fd and data_offset.

Remove the duplicated code in __prepare_dmabuf().

Signed-off-by: Yunke Cao <yunkec@...omium.org>
Acked-by: Tomasz Figa <tfiga@...omium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/common/videobuf2/videobuf2-core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 50015a2ea5ce0..98719aa986bb9 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -281,6 +281,10 @@ static void __vb2_plane_dmabuf_put(struct vb2_buffer *vb, struct vb2_plane *p)
 	p->mem_priv = NULL;
 	p->dbuf = NULL;
 	p->dbuf_mapped = 0;
+	p->bytesused = 0;
+	p->length = 0;
+	p->m.fd = 0;
+	p->data_offset = 0;
 }
 
 /*
@@ -1169,10 +1173,6 @@ static int __prepare_dmabuf(struct vb2_buffer *vb, const void *pb)
 
 		/* Release previously acquired memory if present */
 		__vb2_plane_dmabuf_put(vb, &vb->planes[plane]);
-		vb->planes[plane].bytesused = 0;
-		vb->planes[plane].length = 0;
-		vb->planes[plane].m.fd = 0;
-		vb->planes[plane].data_offset = 0;
 
 		/* Acquire each plane's memory */
 		mem_priv = call_ptr_memop(vb, attach_dmabuf,
-- 
2.43.0