linux-kernel - [PATCH v2 0/4] Improvement around mtk_vcodec_mem

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Date: Thu, 21 Dec 2023 17:17:42 +0800
From: Fei Shao <fshao@...omium.org>
To: Hans Verkuil <hverkuil-cisco@...all.nl>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Fei Shao <fshao@...omium.org>,
	Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Nicolas Dufresne <nicolas.dufresne@...labora.com>,
	Tiffany Lin <tiffany.lin@...iatek.com>,
	Xiaoyong Lu <xiaoyong.lu@...iatek.com>,
	Yunfei Dong <yunfei.dong@...iatek.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH v2 0/4] Improvement around mtk_vcodec_mem_free() logging and usage

Hi,

This series includes some improvements around mtk_vcodec_mem_free() in
mtk_vcodec_util.c.

I noticed that mtk_vcodec_mem_free() generates a spurious error if the
target DMA buffer has been freed previously:
  mtk_vcodec_mem_free(),69: [MTK_V4L2][ERROR] 18000000.video-codec
  dma_free size=0 failed!

The warning is harmless, but it brings some confusion to our developers
and testing infra, so I sent this series to fix that with some minor
improvement for the driver alongside.

The first two patches are for aesthetic and style improvements, the
third tries to make the error logs more informative, and the last adds
back the missing checks when calling the free function.

Regards,
Fei

v1: https://lore.kernel.org/all/20231113123049.4117280-1-fshao@chromium.org/

Changes in v2:
- rebased on top of next-20231219
- revise commit message for clearer intention and rationale
- update the error messages based on the suggestion

Fei Shao (4):
  media: mediatek: vcodec: Replace dev_name in error string
  media: mediatek: vcodec: Drop unnecessary variable
  media: mediatek: vcodec: Update mtk_vcodec_mem_free() error messages
  media: mediatek: vcodec: Only free buffer VA that is not NULL

 .../mediatek/vcodec/common/mtk_vcodec_util.c  | 23 +++++++++----------
 .../vcodec/decoder/vdec/vdec_av1_req_lat_if.c | 22 ++++++++++++------
 .../vcodec/encoder/venc/venc_h264_if.c        |  5 ++--
 3 files changed, 29 insertions(+), 21 deletions(-)

-- 
2.43.0.472.g3155946c3a-goog