On 4/21/20 3:46 PM, mwilck@xxxxxxxx wrote:
From: Martin Wilck <mwilck@xxxxxxxx>
The purpose of the UNLOADING flag is to avoid port login procedures
to continue when a controller is in the process of shutting down.
It makes sense to set this flag before starting session teardown.
Furthermore, use atomic test_and_set_bit() to avoid the shutdown
being run multiple times in parallel. In qla2x00_disable_board_on_pci_error(),
the test for UNLOADING is postponed until after the check for an already
disabled PCI board.
Fixes: 45235022da99 ("scsi: qla2xxx: Fix driver unload by shutting down chip")
Reviewed-by: Arun Easi <aeasi@xxxxxxxxxxx>
Reviewed-by: Daniel Wagner <dwagner@xxxxxxx>
Reviewed-by: Roman Bolshakov <r.bolshakov@xxxxxxxxx>
Signed-off-by: Martin Wilck <mwilck@xxxxxxxx>
---
drivers/scsi/qla2xxx/qla_os.c | 32 ++++++++++++++------------------
1 file changed, 14 insertions(+), 18 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index d9072ea..ce0dabb 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3732,6 +3732,13 @@ qla2x00_remove_one(struct pci_dev *pdev)
}
qla2x00_wait_for_hba_ready(base_vha);
+ /*
+ * if UNLOADING flag is already set, then continue unload,
+ * where it was set first.
+ */
+ if (test_and_set_bit(UNLOADING, &base_vha->dpc_flags))
+ return;
+
if (IS_QLA25XX(ha) || IS_QLA2031(ha) || IS_QLA27XX(ha) ||
IS_QLA28XX(ha)) {
if (ha->flags.fw_started)
@@ -3750,15 +3757,6 @@ qla2x00_remove_one(struct pci_dev *pdev)
qla2x00_wait_for_sess_deletion(base_vha);
- /*
- * if UNLOAD flag is already set, then continue unload,
- * where it was set first.
- */
- if (test_bit(UNLOADING, &base_vha->dpc_flags))
- return;
-
- set_bit(UNLOADING, &base_vha->dpc_flags);
-
qla_nvme_delete(base_vha);
dma_free_coherent(&ha->pdev->dev,
@@ -6628,13 +6626,6 @@ qla2x00_disable_board_on_pci_error(struct work_struct *work)
struct pci_dev *pdev = ha->pdev;
scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
- /*
- * if UNLOAD flag is already set, then continue unload,
- * where it was set first.
- */
- if (test_bit(UNLOADING, &base_vha->dpc_flags))
- return;
-
ql_log(ql_log_warn, base_vha, 0x015b,
"Disabling adapter.\n");
@@ -6645,9 +6636,14 @@ qla2x00_disable_board_on_pci_error(struct work_struct *work)
return;
}
- qla2x00_wait_for_sess_deletion(base_vha);
+ /*
+ * if UNLOADING flag is already set, then continue unload,
+ * where it was set first.
+ */
+ if (test_and_set_bit(UNLOADING, &base_vha->dpc_flags))
+ return;
- set_bit(UNLOADING, &base_vha->dpc_flags);
+ qla2x00_wait_for_sess_deletion(base_vha);
qla2x00_delete_all_vps(ha, base_vha);
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
--
Himanshu Madhani
Oracle Linux Engineering
