linux-kernel - Re: [PATCH v2] Revert "media: qcom: camss: Restructure camss_link

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Message-ID: <60bfe389-cea9-4aea-9175-fc80f1e9f594@linaro.org>
Date: Sun, 15 Dec 2024 13:58:30 +0200
From: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>
To: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Robert Foss <rfoss@...nel.org>, Todor Tomov <todor.too@...il.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>, Hans Verkuil
 <hverkuil@...all.nl>, Suresh Vankadara <quic_svankada@...cinc.com>,
 Vikram Sharma <quic_vikramsa@...cinc.com>,
 Trishansh Bhardwaj <quic_tbhardwa@...cinc.com>
Cc: linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Revert "media: qcom: camss: Restructure
 camss_link_entities"

On 12/15/24 02:33, Bryan O'Donoghue wrote:
> This reverts commit cc1ecabe67d92a2da0b0402f715598e8dbdc3b9e.
> 
> This commit has a basic flaw in that it relies on camss->res->csid_num as a
> control to index the array camss->vfe[i].
> 
> Testing on a platform where csid_num > vfe_num showed this bug up.
> 
> camss->vfe should only be indexed by camss->res->vfe_num. Since this commit
> is meant to make the code be more readable reverting will simply restore
> the previous correct bounds checking.
> 
> We can make another pass at making camss_link_entities look prettier but,
> for now we should zap the bug introduced.
> 
> Fixes: cc1ecabe67d9 ("media: qcom: camss: Restructure camss_link_entities")
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>

This change is very welcome.

Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>

--
Best wishes,
Vladimir