From: Furquan Shaikh Date: Thu, 20 Aug 2020 07:52:41 +0000 (-0700) Subject: drivers: gpu: amd: Initialize amdgpu_dm_backlight_caps object to 0 in amdgpu_dm_updat... X-Git-Tag: v5.4.64~112 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9947928e619a2229ca98d1b17474c21a9099503f;p=users%2Fdwmw2%2Flinux.git drivers: gpu: amd: Initialize amdgpu_dm_backlight_caps object to 0 in amdgpu_dm_update_backlight_caps [ Upstream commit 5896585512e5156482335e902f7c7393b940da51 ] In `amdgpu_dm_update_backlight_caps()`, there is a local `amdgpu_dm_backlight_caps` object that is filled in by `amdgpu_acpi_get_backlight_caps()`. However, this object is uninitialized before the call and hence the subsequent check for aux_support can fail since it is not initialized by `amdgpu_acpi_get_backlight_caps()` as well. This change initializes this local `amdgpu_dm_backlight_caps` object to 0. Reviewed-by: Christian König Signed-off-by: Furquan Shaikh Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 247f53d41993d..3d131f21e5ab2 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -2064,6 +2064,8 @@ static void amdgpu_dm_update_backlight_caps(struct amdgpu_display_manager *dm) #if defined(CONFIG_ACPI) struct amdgpu_dm_backlight_caps caps; + memset(&caps, 0, sizeof(caps)); + if (dm->backlight_caps.caps_valid) return;