diff mbox series

[v5,27/27] drm/amdgpu: Verify DMA opearations from device are done

Message ID 20210428151207.1212258-28-andrey.grodzovsky@amd.com (mailing list archive)
State New, archived
Headers show
Series RFC Support hot device unplug in amdgpu | expand

Commit Message

Andrey Grodzovsky April 28, 2021, 3:12 p.m. UTC 
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 mbox series

Patch

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index d0f34f230ef3..f3e8fbde62a0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1258,7 +1258,13 @@  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