From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>,
Rob Clark <robdclark@gmail.com>,
Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>,
linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drm/msm/gpu: Drop qos request if devm_devfreq_add_device() fails
Date: Tue, 2 Aug 2022 09:43:59 +0300 [thread overview]
Message-ID: <1948d519-9ec0-e874-d51a-6d9f2f5ca3f6@linaro.org> (raw)
In-Reply-To: <20220708162632.3529864-1-bjorn.andersson@linaro.org>
On 08/07/2022 19:26, Bjorn Andersson wrote:
> In the event that devm_devfreq_add_device() fails the device's qos freq
> list is left referencing df->idle_freq and df->boost_freq. Attempting to
> initialize devfreq again after a probe deferral will then cause invalid
> memory accesses in dev_pm_qos_add_request().
>
> Fix this by dropping the requests in the error path.
>
> Fixes: 7c0ffcd40b16 ("drm/msm/gpu: Respect PM QoS constraints")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
> drivers/gpu/drm/msm/msm_gpu_devfreq.c | 2 ++
> 1 file changed, 2 insertions(+)
--
With best wishes
Dmitry
prev parent reply other threads:[~2022-08-02 6:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-08 16:26 Bjorn Andersson
2022-08-01 17:38 ` Rob Clark
2022-08-02 6:43 ` Dmitry Baryshkov [this message]
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