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

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Date: Wed, 27 Mar 2024 17:18:12 +0800
From: Fei Shao <fshao@...omium.org>
To: Hans Verkuil <hverkuil-cisco@...all.nl>
Cc: 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, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH v2 0/4] Improvement around mtk_vcodec_mem_free() logging
 and usage

On Thu, Dec 21, 2023 at 5:23 PM Fei Shao <fshao@...omium.org> wrote:
>
> 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(-)

Hi Hans,

I'd like to get some attention for this series in case it has been
overlooked. It still applies to next-20240327 without conflict.
Please let me know if you have any feedback or concerns on this.

Thank you,
Fei
>
> --
> 2.43.0.472.g3155946c3a-goog
>