[radeon-alex:drm-next-4.20-wip 220/235] drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c:771:1-3: WARNING: PTR_ERR_OR_ZERO can be used

tree: git://people.freedesktop.org/~agd5f/linux.git drm-next-4.20-wip head: bdb1922abd620d24715906bac4d119274d98f4c9 commit: e498eb7136042aa9a352b1039c678537f4694158 [220/235] drm/amd/display: Add support for hw_state logging via debugfs

coccinelle warnings: (new ones prefixed by >>)

...

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c:771:1-3: WARNING: PTR_ERR_OR_ZERO can be used

Please review and possibly fold the followup patch.

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