drm/msm/gpu: Drop qos request if devm_devfreq_add_device() fails

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[ Upstream commit 02b9f26362 ]

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: 7c0ffcd40b ("drm/msm/gpu: Respect PM QoS constraints")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/493001/
Link: https://lore.kernel.org/r/20220708162632.3529864-1-bjorn.andersson@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Bjorn Andersson 2022-07-08 09:26:32 -07:00 • committed by Greg Kroah-Hartman

parent 2c75891d56

commit 5d5383b8da

1 changed files with 2 additions and 0 deletions

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drivers/gpu/drm/msm/msm_gpu_devfreq.c

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