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drm/amdgpu: amdgpu_device_recover_vram always failed if only one node in shadow_list

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amdgpu_bo_restore_shadow would assign zero to r if succeeded.
r would remain zero if there is only one node in shadow_list.
current code would always return failure when r <= 0.
restart the timeout for each wait was a rather problematic bug as well.
The value of tmo SHOULD be changed, otherwise we wait tmo jiffies on each loop.

Signed-off-by: Wentao Lou <Wentao.Lou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
wentalou 2019-04-02 17:13:05 +08:00 committed by Alex Deucher
parent d4162c61e2
commit 1712fb1a2f
1 changed files with 9 additions and 4 deletions
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13
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -3173,11 +3173,16 @@ static int amdgpu_device_recover_vram(struct amdgpu_device *adev)
break;
if (fence) {
r = dma_fence_wait_timeout(fence, false, tmo);
tmo = dma_fence_wait_timeout(fence, false, tmo);
dma_fence_put(fence);
fence = next;
if (r <= 0)
if (tmo == 0) {
r = -ETIMEDOUT;
break;
} else if (tmo < 0) {
r = tmo;
break;
}
} else {
fence = next;
}
@ -3188,8 +3193,8 @@ static int amdgpu_device_recover_vram(struct amdgpu_device *adev)
tmo = dma_fence_wait_timeout(fence, false, tmo);
dma_fence_put(fence);
if (r <= 0 || tmo <= 0) {
DRM_ERROR("recover vram bo from shadow failed\n");
if (r < 0 || tmo <= 0) {
DRM_ERROR("recover vram bo from shadow failed, r is %ld, tmo is %ld\n", r, tmo);
return -EIO;
}