[PATCH 04/13] drm/amdgpu/vce: Clear VCPU BO before copying firmware to it (v2)

["Timur Kristóf" <timur.kristof@gmail.com>]

The VCPU BO doesn't only contain the VCE firmware but also other
ranges that the VCE uses for its stack and data. Let's initialize
this to zero to avoid having garbage in the VCPU BO.

v2:
- Only clear BO after creation, not on resume.

Fixes: d38ceaf99ed0 ("drm/amdgpu: add core driver (v4)")
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
index b9060bcd4806..e028ad0d3b7a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
@@ -187,6 +187,8 @@ int amdgpu_vce_sw_init(struct amdgpu_device *adev, unsigned long size)
 		return r;
 	}
 
+	memset_io(adev->vce.cpu_addr, 0, size);
+
 	for (i = 0; i < AMDGPU_MAX_VCE_HANDLES; ++i) {
 		atomic_set(&adev->vce.handles[i], 0);
 		adev->vce.filp[i] = NULL;
-- 
2.51.0