From: Martin Wilck <mwilck@xxxxxxxx> commit 856e152a3c08bf7987cbd41900741d83d9cddc8e upstream. 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. Link: https://lore.kernel.org/r/20200421204621.19228-2-mwilck@xxxxxxxx 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> Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx> Signed-off-by: Martin Wilck <mwilck@xxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/qla2xxx/qla_os.c | 32 ++++++++++++++------------------ 1 file changed, 14 insertions(+), 18 deletions(-) --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -3654,6 +3654,13 @@ 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)) { if (ha->flags.fw_started) qla2x00_abort_isp_cleanup(base_vha); @@ -3671,15 +3678,6 @@ 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, @@ -5845,13 +5843,6 @@ qla2x00_disable_board_on_pci_error(struc 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"); @@ -5862,9 +5853,14 @@ qla2x00_disable_board_on_pci_error(struc 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);
