drm/amdgpu: fix locking in vega10_ih_prescreen_iv
The vm pointer can become invalid as soon as the lock is released.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
index b69ceaf..746748e 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
@@ -278,9 +278,9 @@
/* Track retry faults in per-VM fault FIFO. */
spin_lock(&adev->vm_manager.pasid_lock);
vm = idr_find(&adev->vm_manager.pasid_idr, pasid);
- spin_unlock(&adev->vm_manager.pasid_lock);
if (WARN_ON_ONCE(!vm)) {
/* VM not found, process it normally */
+ spin_unlock(&adev->vm_manager.pasid_lock);
amdgpu_ih_clear_fault(adev, key);
return true;
}
@@ -288,9 +288,11 @@
r = kfifo_put(&vm->faults, key);
if (!r) {
/* FIFO is full. Ignore it until there is space */
+ spin_unlock(&adev->vm_manager.pasid_lock);
amdgpu_ih_clear_fault(adev, key);
goto ignore_iv;
}
+ spin_unlock(&adev->vm_manager.pasid_lock);
/* It's the first fault for this address, process it normally */
return true;