linux-kernel - [PATCH v2 0/3] media: mediatek: vcodec: fix vcodec smatch warning

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Message-ID: <20240613093357.583-1-yunfei.dong@mediatek.com>
Date: Thu, 13 Jun 2024 17:33:54 +0800
From: Yunfei Dong <yunfei.dong@...iatek.com>
To: Nícolas F . R . A . Prado
	<nfraprado@...labora.com>, Sebastian Fricke <sebastian.fricke@...labora.com>,
	Nicolas Dufresne <nicolas.dufresne@...labora.com>, Hans Verkuil
	<hverkuil-cisco@...all.nl>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Benjamin Gaignard
	<benjamin.gaignard@...labora.com>, Nathan Hebert <nhebert@...omium.org>,
	Andrzej Pietrasiewicz <andrzej.p@...labora.com>
CC: Hsin-Yi Wang <hsinyi@...omium.org>, Fritz Koenig <frkoenig@...omium.org>,
	Daniel Vetter <daniel@...ll.ch>, Steve Cho <stevecho@...omium.org>, Yunfei
 Dong <yunfei.dong@...iatek.com>, <linux-media@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v2 0/3] media: mediatek: vcodec: fix vcodec smatch warning

Fix below smatch static checker warning from [bug report]:

The patch 397edc703a10: "media: mediatek: vcodec: add h264 decoder
driver for mt8186" from May 12, 2022 (linux-next), leads to the
following (in development) Smatch static checker warning:

drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_if.c:351
vdec_h264_slice_decode() potential NULL container_of 'fb'

drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp8_req_if.c:337
vdec_vp8_slice_decode() potential NULL container_of 'fb'

drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_multi_if.c:728
vdec_h264_slice_single_decode() potential NULL container_of 'fb'

---
Changed with v1:
- Change the return value from -EBUSY to -ENOMEM when the driver can't get
  frame buffer.
---
Yunfei Dong (3):
  media: mediatek: vcodec: fix h264 multi statless decoder smatch
    warning
  media: mediatek: vcodec: fix vp8 stateless decoder smatch warning
  media: mediatek: vcodec: fix h264 stateless decoder smatch warning

 .../mediatek/vcodec/decoder/vdec/vdec_h264_req_if.c    |  9 +++++++--
 .../vcodec/decoder/vdec/vdec_h264_req_multi_if.c       |  9 +++++++--
 .../mediatek/vcodec/decoder/vdec/vdec_vp8_req_if.c     | 10 +++++++---
 3 files changed, 21 insertions(+), 7 deletions(-)

-- 
2.18.0