Commit b42fee5e authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu: fix error checking in amdgpu_read_mm_registers for nv 

Properly skip non-existent registers as well.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/2442


Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 2915e43a

drivers/gpu/drm/amd/amdgpu/nv.c

+4 −3
Original line number Diff line number Diff line
@@ -444,8 +444,9 @@ static int nv_read_register(struct amdgpu_device *adev, u32 se_num, 
	*value = 0;

	for (i = 0; i < ARRAY_SIZE(nv_allowed_read_registers); i++) {

		en = &nv_allowed_read_registers[i];

		if (adev->reg_offset[en->hwip][en->inst] &&

		    reg_offset != (adev->reg_offset[en->hwip][en->inst][en->seg]

		if (!adev->reg_offset[en->hwip][en->inst])

			continue;

		else if (reg_offset != (adev->reg_offset[en->hwip][en->inst][en->seg]

					+ en->reg_offset))

			continue;