6.6-stable review patch. If anyone has any objections, please let me know.
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From: Lukasz Luba lukasz.luba@arm.com
[ Upstream commit 8f32ddd87e499ba6d2dc74ce30b6932baf1e1fc3 ]
There is a need to check the returned value of the registration function. In case of returned error, print that and stop the init process.
Fixes: 7c0ffcd40b16 ("drm/msm/gpu: Respect PM QoS constraints") Signed-off-by: Lukasz Luba lukasz.luba@arm.com Patchwork: https://patchwork.freedesktop.org/patch/620336/ Signed-off-by: Rob Clark robdclark@chromium.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/msm_gpu_devfreq.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_gpu_devfreq.c b/drivers/gpu/drm/msm/msm_gpu_devfreq.c index ea70c1c32d940..6970b0f7f457c 100644 --- a/drivers/gpu/drm/msm/msm_gpu_devfreq.c +++ b/drivers/gpu/drm/msm/msm_gpu_devfreq.c @@ -140,6 +140,7 @@ void msm_devfreq_init(struct msm_gpu *gpu) { struct msm_gpu_devfreq *df = &gpu->devfreq; struct msm_drm_private *priv = gpu->dev->dev_private; + int ret;
/* We need target support to do devfreq */ if (!gpu->funcs->gpu_busy) @@ -156,8 +157,12 @@ void msm_devfreq_init(struct msm_gpu *gpu)
mutex_init(&df->lock);
- dev_pm_qos_add_request(&gpu->pdev->dev, &df->boost_freq, - DEV_PM_QOS_MIN_FREQUENCY, 0); + ret = dev_pm_qos_add_request(&gpu->pdev->dev, &df->boost_freq, + DEV_PM_QOS_MIN_FREQUENCY, 0); + if (ret < 0) { + DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize QoS\n"); + return; + }
msm_devfreq_profile.initial_freq = gpu->fast_rate;