linux-kernel - Re: [PATCH] soc: qcom: ocmem: don't return NULL in of_get

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Date:   Sun, 31 Jan 2021 06:24:33 -0500
From:   Brian Masney <masneyb@...tation.org>
To:     Luca Weiss <luca@...tu.xyz>
Cc:     linux-arm-msm@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Clark <robdclark@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] soc: qcom: ocmem: don't return NULL in of_get_ocmem

On Sat, Jan 30, 2021 at 03:23:49PM +0100, Luca Weiss wrote:
> If ocmem probe fails for whatever reason, of_get_ocmem returned NULL.
> Without this, users must check for both NULL and IS_ERR on the returned
> pointer - which didn't happen in drivers/gpu/drm/msm/adreno/adreno_gpu.c
> leading to a NULL pointer dereference.
> 
> Fixes: 88c1e9404f1d ("soc: qcom: add OCMEM driver")
> Signed-off-by: Luca Weiss <luca@...tu.xyz>

Reviewed-by: Brian Masney <masneyb@...tation.org>