scsi: qla2xxx: Defer processing of GS IOCB calls

This patch defers processing of GS IOCB calls from interrupt context to
avoid hardware spinlock recursion.

Following stack trace is seen

? mod_timer+0x193/0x330
? ql_dbg+0xa7/0xf0 [qla2xxx]
_raw_spin_lock_irqsave+0x31/0x40
qla2x00_start_sp+0x3b/0x250 [qla2xxx]
qla24xx_async_gnl+0x1d3/0x240 [qla2xxx]
qla24xx_fcport_handle_login+0x285/0x290 [qla2xxx]
? vprintk_func+0x20/0x50

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 7dd1978..57b8f43 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -975,7 +975,7 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport)
                        ql_dbg(ql_dbg_disc, vha, 0x20bd,
                            "%s %d %8phC post gnl\n",
                            __func__, __LINE__, fcport->port_name);
-                       qla24xx_async_gnl(vha, fcport);
+                       qla24xx_post_gnl_work(vha, fcport);
                } else {
                        ql_dbg(ql_dbg_disc, vha, 0x20bf,
                            "%s %d %8phC post login\n",
@@ -1143,7 +1143,7 @@ void qla24xx_handle_relogin_event(scsi_qla_host_t *vha,
                ql_dbg(ql_dbg_disc, vha, 0x20e9, "%s %d %8phC post gidpn\n",
                    __func__, __LINE__, fcport->port_name);
 
-               qla24xx_async_gidpn(vha, fcport);
+               qla24xx_post_gidpn_work(vha, fcport);
                return;
        }