On Wed, May 15, 2019 at 01:00:52PM -0400, Sean Paul wrote:
> From: Sean Paul <seanpaul@xxxxxxxxxxxx>
>
> dev_pm_domain_attach_by_name() can return NULL, so we should check for
> that case when we're about to dereference gxpd.
>
> Fixes: 9325d4266afd ("drm/msm/gpu: Attach to the GPU GX power domain")
> Cc: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
> Cc: Rob Clark <robdclark@xxxxxxxxxxxx>
> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
Reviewed-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> index 9155dafae2a90..38e2cfa9cec79 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> @@ -747,7 +747,7 @@ int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu)
> * will make sure that the refcounting is correct in case we need to
> * bring down the GX after a GMU failure
> */
> - if (!IS_ERR(gmu->gxpd))
> + if (!IS_ERR_OR_NULL(gmu->gxpd))
> pm_runtime_get(gmu->gxpd);
>
> out:
> @@ -863,7 +863,7 @@ int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
> * domain. Usually the GMU does this but only if the shutdown sequence
> * was successful
> */
> - if (!IS_ERR(gmu->gxpd))
> + if (!IS_ERR_OR_NULL(gmu->gxpd))
> pm_runtime_put_sync(gmu->gxpd);
>
> clk_bulk_disable_unprepare(gmu->nr_clocks, gmu->clocks);
> @@ -1234,7 +1234,7 @@ void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
>
> pm_runtime_disable(gmu->dev);
>
> - if (!IS_ERR(gmu->gxpd)) {
> + if (!IS_ERR_OR_NULL(gmu->gxpd)) {
> pm_runtime_disable(gmu->gxpd);
> dev_pm_domain_detach(gmu->gxpd, false);
> }
> --
> Sean Paul, Software Engineer, Google / Chromium OS
>
--
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
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