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| author | Alex Xie <AlexBin.Xie@amd.com> | 2016-06-06 22:14:57 (GMT) |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-07-07 18:51:26 (GMT) |
| commit | 3a6f8e0c7294ce1c0bdeaa778df1095197b4cf6a (patch) | |
| tree | 1d240f5de34562048d8b1259b232712b9d8196c9 | |
| parent | 677131a16d84d522fb096ff489034471588661a5 (diff) | |
| download | linux-3a6f8e0c7294ce1c0bdeaa778df1095197b4cf6a.tar.xz | |
drm/amdgpu: Add comment to describe the purpose of one difficult if statement
Use == instead of != in the if statement to make code easier understood
Signed-off-by: Alex Xie <AlexBin.Xie@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 00cb589..8dafbd3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -780,8 +780,13 @@ static void amdgpu_vm_update_ptes(struct amdgpu_device *adev, next_pe_start = amdgpu_bo_gpu_offset(pt); next_pe_start += (addr & mask) * 8; - if (cur_pe_end != next_pe_start) { - + if (cur_pe_end == next_pe_start) { + /* The next ptb is consecutive to current ptb. + * Don't call amdgpu_vm_frag_ptes now. + * Will update two ptbs together in future. + */ + cur_pe_end += 8 * nptes; + } else { amdgpu_vm_frag_ptes(adev, vm_update_params, cur_pe_start, cur_pe_end, cur_dst, flags); @@ -789,8 +794,6 @@ static void amdgpu_vm_update_ptes(struct amdgpu_device *adev, cur_pe_start = next_pe_start; cur_pe_end = next_pe_start + 8 * nptes; cur_dst = dst; - } else { - cur_pe_end += 8 * nptes; } addr += nptes; |