linux-kernel - Re: [PATCH next] i2c: qcom-cci: Fix error checking in cci

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Message-ID: <47e3acac-7d4f-43bd-bd55-5ae9ab993f2d@kadam.mountain>
Date:   Tue, 5 Sep 2023 12:10:31 +0300
From:   Dan Carpenter <dan.carpenter@...aro.org>
To:     Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
Cc:     dmitry.baryshkov@...aro.org,
        Loic Poulain <loic.poulain@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Andi Shyti <andi.shyti@...nel.org>,
        Liao Chang <liaochang1@...wei.com>,
        Todor Tomov <todor.too@...il.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Vinod Koul <vkoul@...nel.org>, Wolfram Sang <wsa@...nel.org>,
        linux-i2c@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        error27@...il.com, vegard.nossum@...cle.com
Subject: Re: [PATCH next] i2c: qcom-cci: Fix error checking in cci_probe()

On Wed, Aug 23, 2023 at 12:42:02PM -0700, Harshit Mogalapalli wrote:
> devm_clk_bulk_get_all() can return zero when no clocks are obtained.
> Passing zero to dev_err_probe() is a success which is incorrect.
> 
> Fixes: 605efbf43813 ("i2c: qcom-cci: Use dev_err_probe in probe function")
> Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
> ---
> Only compile tested, found by static analysis with smatch.
> 
> https://lore.kernel.org/all/CAA8EJprTOjbOy7N5+8NiJaNNhK+_btdUUFcpHKPkMuCZj5umMA@mail.gmail.com/
> ^^ I reported initially here, Dmitry suggested we need to fix it in a
> different patch.
> 
> the Fixes commit used above pointed this bug, but the real fixes tag is this:
> Fixes: e517526195de ("i2c: Add Qualcomm CCI I2C driver")

This has already been applied but, for future reference, you should have
gone with the real fixes tag instead of where the static checker started
complaining.

regards,
dan carpenter