In case device remove is just simualted by sysfs then verify device doesn't keep doing DMA to the released memory after pci_remove is done.
Signed-off-by: Andrey Grodzovsky andrey.grodzovsky@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 83006f45b10b..5e6af9e0b7bf 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1314,7 +1314,13 @@ amdgpu_pci_remove(struct pci_dev *pdev) drm_dev_unplug(dev); amdgpu_driver_unload_kms(dev);
+ /* + * Flush any in flight DMA operations from device. + * Clear the Bus Master Enable bit and then wait on the PCIe Device + * StatusTransactions Pending bit. + */ pci_disable_device(pdev); + pci_wait_for_pending_transaction(pdev); }
static void