drm/amdgpu: Fix TLB invalidation request when using semaphore

[ Upstream commit 37c58ddf57364d1a636850bb8ba6acbe1e16195e ]

Use a more meaningful variable name for the invalidation request
that is distinct from the tmp variable that gets overwritten when
acquiring the invalidation semaphore.

Fixes: 4ed8a03740d0 ("drm/amdgpu: invalidate mmhub semaphore workaround in gmc9/gmc10")
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Yong Zhao <Yong.Zhao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
index a7ba4c6..f642e06 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
@@ -230,7 +230,8 @@ static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
                                   unsigned int vmhub, uint32_t flush_type)
 {
        struct amdgpu_vmhub *hub = &adev->vmhub[vmhub];
-       u32 tmp = gmc_v10_0_get_invalidate_req(vmid, flush_type);
+       u32 inv_req = gmc_v10_0_get_invalidate_req(vmid, flush_type);
+       u32 tmp;
        /* Use register 17 for GART */
        const unsigned eng = 17;
        unsigned int i;
@@ -258,7 +259,7 @@ static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
                        DRM_ERROR("Timeout waiting for sem acquire in VM flush!\n");
        }
 
-       WREG32_NO_KIQ(hub->vm_inv_eng0_req + eng, tmp);
+       WREG32_NO_KIQ(hub->vm_inv_eng0_req + eng, inv_req);
 
        /*
         * Issue a dummy read to wait for the ACK register to be cleared

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index da53a55..688111e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -487,13 +487,13 @@ static void gmc_v9_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
 {
        bool use_semaphore = gmc_v9_0_use_invalidate_semaphore(adev, vmhub);
        const unsigned eng = 17;
-       u32 j, tmp;
+       u32 j, inv_req, tmp;
        struct amdgpu_vmhub *hub;
 
        BUG_ON(vmhub >= adev->num_vmhubs);
 
        hub = &adev->vmhub[vmhub];
-       tmp = gmc_v9_0_get_invalidate_req(vmid, flush_type);
+       inv_req = gmc_v9_0_get_invalidate_req(vmid, flush_type);
 
        /* This is necessary for a HW workaround under SRIOV as well
         * as GFXOFF under bare metal
@@ -504,7 +504,7 @@ static void gmc_v9_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
                uint32_t req = hub->vm_inv_eng0_req + eng;
                uint32_t ack = hub->vm_inv_eng0_ack + eng;
 
-               amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack, tmp,
+               amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack, inv_req,
                                1 << vmid);
                return;
        }
@@ -532,7 +532,7 @@ static void gmc_v9_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
                        DRM_ERROR("Timeout waiting for sem acquire in VM flush!\n");
        }
 
-       WREG32_NO_KIQ(hub->vm_inv_eng0_req + eng, tmp);
+       WREG32_NO_KIQ(hub->vm_inv_eng0_req + eng, inv_req);
 
        /*
         * Issue a dummy read to wait for the ACK register to be cleared