[PATCH AUTOSEL 6.6 14/17] drm/amdgpu: Do not program VF copy regs in mmhub v1.8 under SRIOV (v2)

[Sasha Levin]

From: Victor Lu <victorchengchi.lu@xxxxxxx>

[ Upstream commit 0288603040c38ccfeb5342f34a52673366d90038 ]

MC_VM_AGP_* registers should not be programmed by guest driver.

v2: move early return outside of loop

Signed-off-by: Victor Lu <victorchengchi.lu@xxxxxxx>
Reviewed-by: Samir Dhume <samir.dhume@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
index 784c4e0774707..3d8e579d5c4e8 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c
@@ -130,6 +130,9 @@ static void mmhub_v1_8_init_system_aperture_regs(struct amdgpu_device *adev)
 	uint64_t value;
 	int i;
 
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	inst_mask = adev->aid_mask;
 	for_each_inst(i, inst_mask) {
 		/* Program the AGP BAR */
@@ -139,9 +142,6 @@ static void mmhub_v1_8_init_system_aperture_regs(struct amdgpu_device *adev)
 		WREG32_SOC15(MMHUB, i, regMC_VM_AGP_TOP,
 			     adev->gmc.agp_end >> 24);
 
-		if (amdgpu_sriov_vf(adev))
-			return;
-
 		/* Program the system aperture low logical page number. */
 		WREG32_SOC15(MMHUB, i, regMC_VM_SYSTEM_APERTURE_LOW_ADDR,
 			min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18);
-- 
2.42.0