NTB: add pci shutdown handler for AMD NTB (b350f0a3) · Commits · 戴 / test

The PCI shutdown handler is invoked in response to system reboot or shutdown. A data transfer might still be in flight when this happens. So the very first action we take here is to send a link down notification, so that any pending data transfer is terminated. Rest of the actions are same as that of PCI remove handler. Signed-off-by:

Arindam Nath <arindam.nath@amd.com> Signed-off-by:

Jon Mason <jdmason@kudzu.us>

drivers/ntb/hw/amd/ntb_hw_amd.c

+17 −0

Original line number	Diff line number	Diff line
		@@ -1296,6 +1296,22 @@ static void amd_ntb_pci_remove(struct pci_dev *pdev)
		kfree(ndev);
		}

		static void amd_ntb_pci_shutdown(struct pci_dev *pdev)
		{
		struct amd_ntb_dev *ndev = pci_get_drvdata(pdev);

		/* Send link down notification */
		ntb_link_event(&ndev->ntb);

		amd_deinit_side_info(ndev);
		ntb_peer_db_set(&ndev->ntb, BIT_ULL(ndev->db_last_bit));
		ntb_unregister_device(&ndev->ntb);
		ndev_deinit_debugfs(ndev);
		amd_deinit_dev(ndev);
		amd_ntb_deinit_pci(ndev);
		kfree(ndev);
		}

		static const struct file_operations amd_ntb_debugfs_info = {
		.owner = THIS_MODULE,
		.open = simple_open,
		@@ -1326,6 +1342,7 @@ static struct pci_driver amd_ntb_pci_driver = {
		.id_table = amd_ntb_pci_tbl,
		.probe = amd_ntb_pci_probe,
		.remove = amd_ntb_pci_remove,
		.shutdown = amd_ntb_pci_shutdown,
		};

		static int __init amd_ntb_pci_driver_init(void)

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