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drm/amd/display: Stop amdgpu_dm initialize when stream nums greater than 6

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[ Upstream commit 84723eb6068c50610c5c0893980d230d7afa2105 ]

[Why]
Coverity reports OVERRUN warning. Should abort amdgpu_dm
initialize.

[How]
Return failure to amdgpu_dm_init.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hersen Wu 2024-04-24 16:00:19 -04:00 committed by Greg Kroah-Hartman
parent 40c2e8bc11
commit 754321ed63
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -3341,7 +3341,10 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
/* There is one primary plane per CRTC */
primary_planes = dm->dc->caps.max_streams;
ASSERT(primary_planes <= AMDGPU_MAX_PLANES);
if (primary_planes > AMDGPU_MAX_PLANES) {
DRM_ERROR("DM: Plane nums out of 6 planes\n");
return -EINVAL;
}
/*
* Initialize primary planes, implicit planes for legacy IOCTLS.