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NTB: add pci shutdown handler for AMD NTB

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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>
This commit is contained in:
Arindam Nath 2020-02-05 21:24:32 +05:30 committed by Jon Mason
parent ac10d4f6c2
commit b350f0a3eb
1 changed files with 17 additions and 0 deletions
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17
drivers/ntb/hw/amd/ntb_hw_amd.c
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@ -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)