From: Tom St Denis <tom.stdenis@amd.com>
Date: Wed, 7 Sep 2016 12:03:28 +0000 (-0400)
Subject: drm/amd/amdgpu: Remove double lock from gfx v6
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=f166d9f297684faa153dabc2b8887f61bbe7858c;p=openwrt%2Fstaging%2Fblogic.git

drm/amd/amdgpu: Remove double lock from gfx v6

The function gfx_v6_0_get_cu_info() was taking the
grbm_idx_mutex which was then taken by a dependent
function gfx_v6_0_get_cu_active_bitmap().

This patch removes the select from the parent function
to avoid the double lock.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
index a6b76170b9c5..a1484b8f7eb2 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
@@ -3193,13 +3193,11 @@ static void gfx_v6_0_get_cu_info(struct amdgpu_device *adev)
 
 	memset(cu_info, 0, sizeof(*cu_info));
 
-	mutex_lock(&adev->grbm_idx_mutex);
 	for (i = 0; i < adev->gfx.config.max_shader_engines; i++) {
 		for (j = 0; j < adev->gfx.config.max_sh_per_se; j++) {
 			mask = 1;
 			ao_bitmap = 0;
 			counter = 0;
-			gfx_v6_0_select_se_sh(adev, i, j, 0xffffffff);
 			bitmap = gfx_v6_0_get_cu_active_bitmap(adev, i, j);
 			cu_info->bitmap[i][j] = bitmap;
 
@@ -3215,8 +3213,6 @@ static void gfx_v6_0_get_cu_info(struct amdgpu_device *adev)
 			ao_cu_mask |= (ao_bitmap << (i * 16 + j * 8));
 		}
 	}
-	gfx_v6_0_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);
-	mutex_unlock(&adev->grbm_idx_mutex);
 
 	cu_info->number = active_cu_number;
 	cu_info->ao_cu_mask = ao_cu_mask;