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drm/amd/amdgpu: Fix out of bounds warning in amdgpu_hw_ip_info

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Fix an array index out of bounds warning in the DMA IP case of
amdgpu_hw_ip_info() where it was incorrectly checking
adev->gfx.gfx_ring[i].no_user_submission instead of
adev->sdma.instance[i].ring.no_user_submission.

The mismatch caused UBSAN to report an array bounds violation since
it was accessing the GFX ring array with SDMA instance indices.

Fixes: 4310acd446 ("drm/amdgpu: add ring flag for no user submissions")
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jesse Zhang <jesse.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jesse Zhang 2025-04-11 16:22:27 +08:00 committed by Alex Deucher
parent 4172b556fd
commit cf93f10101
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
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@ -427,7 +427,7 @@ static int amdgpu_hw_ip_info(struct amdgpu_device *adev,
type = AMD_IP_BLOCK_TYPE_SDMA;
for (i = 0; i < adev->sdma.num_instances; i++)
if (adev->sdma.instance[i].ring.sched.ready &&
!adev->gfx.gfx_ring[i].no_user_submission)
!adev->sdma.instance[i].ring.no_user_submission)
++num_rings;
ib_start_alignment = 256;
ib_size_alignment = 4;