From: Zheng Wang <zyytlz.wz@xxxxxxx>
[ Upstream commit c5749639f2d0a1f6cbe187d05f70c2e7c544d748 ]
In qedi_probe() we call __qedi_probe() which initializes
&qedi->recovery_work with qedi_recovery_handler() and
&qedi->board_disable_work with qedi_board_disable_work().
When qedi_schedule_recovery_handler() is called, schedule_delayed_work()
will finally start the work.
In qedi_remove(), which is called to remove the driver, the following
sequence may be observed:
Fix this by finishing the work before cleanup in qedi_remove().
CPU0 CPU1
|qedi_recovery_handler
qedi_remove |
__qedi_remove |
iscsi_host_free |
scsi_host_put |
//free shost |
|iscsi_host_for_each_session
|//use qedi->shost
Cancel recovery_work and board_disable_work in __qedi_remove().
Fixes: 4b1068f5d74b ("scsi: qedi: Add MFW error recovery process")
Signed-off-by: Zheng Wang <zyytlz.wz@xxxxxxx>
Link: https://lore.kernel.org/r/20230413033422.28003-1-zyytlz.wz@xxxxxxx
Acked-by: Manish Rangankar <mrangankar@xxxxxxxxxxx>
Reviewed-by: Mike Christie <michael.christie@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/scsi/qedi/qedi_main.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c
index f2ee49756df8d..45d3595541820 100644
--- a/drivers/scsi/qedi/qedi_main.c
+++ b/drivers/scsi/qedi/qedi_main.c
@@ -2450,6 +2450,9 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
qedi_ops->ll2->stop(qedi->cdev);
}
+ cancel_delayed_work_sync(&qedi->recovery_work);
+ cancel_delayed_work_sync(&qedi->board_disable_work);
+
qedi_free_iscsi_pf_param(qedi);
rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
--
2.39.2
