Alvin Park 4d17d8b104 gpu: nvgpu: add check for is_railgated ...

When try to read '/sys/kernel/debug/gpu.0/railgate_residency'
debug fs node, NULL pointer access error can be happened if
is_railgated function is not assinged.
Add check for is_railgated before calling the function pointer.

Bug 200773027

Change-Id: I914b5b0aa48ccb15affe79510b696ebc91129f67
Signed-off-by: Aditya Gupta <adigupta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2596320
(cherry picked from commit e649029c7bed3c7afbd454d7e94f9173377f4c64)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2614156
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: Rohit Upadhyay <rupadhyay@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit

2021-10-21 07:10:24 -07:00

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