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Subject[PATCH 15/15] NTB: add pci shutdown handler for AMD NTB
Date
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>
---
drivers/ntb/hw/amd/ntb_hw_amd.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c
index c6cea0005553..9e310e1ad4d0 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.c
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.c
@@ -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)
--
2.17.1
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