Re: [PATCH 5/5] media: mediatek: vcodec: Fix encoder multi-instance deadlock

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Subject: Re: [PATCH 5/5] media: mediatek: vcodec: Fix encoder multi-instance deadlock
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Date: Mon, 18 Jul 2022 11:54:25 +0200
Cc: Yong Wu <yong.wu@xxxxxxxxxxxx>, Maoguang Meng <maoguang.meng@xxxxxxxxxxxx>, Longfei Wang <longfei.wang@xxxxxxxxxxxx>, Yunfei Dong <yunfei.dong@xxxxxxxxxxxx>, linux-media@xxxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, srv_heupstream@xxxxxxxxxxxx, linux-mediatek@xxxxxxxxxxxxxxxxxxx, Project_Global_Chrome_Upstream_Group@xxxxxxxxxxxx
In-reply-to: <20220716093808.29894-6-irui.wang@mediatek.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0

Il 16/07/22 11:38, Irui Wang ha scritto:

The vb2_queue lock can be set by encoder context, the deadlock
may occur when running multi-instance encoding if use device
mutex lock.

Signed-off-by: Irui Wang <irui.wang@xxxxxxxxxxxx>


This needs a Fixes tag.

References:
- [PATCH 0/5] support mt8188 h264 encoder
  - From: Irui Wang
- [PATCH 5/5] media: mediatek: vcodec: Fix encoder multi-instance deadlock
  - From: Irui Wang

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