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drm/amdgpu: Verify DMA opearations from device are done

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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>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210512142648.666476-16-andrey.grodzovsky@amd.com
This commit is contained in:
Andrey Grodzovsky 2021-05-12 10:26:47 -04:00
parent 984f8261bb
commit 98c6e6a7e2
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
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@ -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