[PATCH] drm/amdgpu: Fix with right return code '-EIO' in 'amdgpu_gmc_vram_checking()'

[Srinivasan Shanmugam]

The amdgpu_gmc_vram_checking() function in emulation checks whether
all of the memory range of shared system memory could be accessed by
GPU, from this aspect, -EIO is returned for error scenarios.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c:919 gmc_v6_0_hw_init() warn: missing error code? 'r'
drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c:1103 gmc_v7_0_hw_init() warn: missing error code? 'r'
drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c:1223 gmc_v8_0_hw_init() warn: missing error code? 'r'
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c:2344 gmc_v9_0_hw_init() warn: missing error code? 'r'

Cc: Xiaojian Du <Xiaojian.Du at amd.com>
Cc: Lijo Lazar <lijo.lazar at amd.com>
Cc: Christian König <christian.koenig at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
Suggested-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index d2f273d77e59..de9576b243aa 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -1046,15 +1046,15 @@ int amdgpu_gmc_vram_checking(struct amdgpu_device *adev)
 	 */
 	ret = memcmp(vram_ptr, cptr, 10);
 	if (ret)
-		return ret;
+		return -EIO;
 
 	ret = memcmp(vram_ptr + (size / 2), cptr, 10);
 	if (ret)
-		return ret;
+		return -EIO;
 
 	ret = memcmp(vram_ptr + size - 10, cptr, 10);
 	if (ret)
-		return ret;
+		return -EIO;
 
 	amdgpu_bo_free_kernel(&vram_bo, &vram_gpu,
 			&vram_ptr);
-- 
2.34.1