scsi: qla2xxx: Prevent relogin trigger from sending too many commands

This patch adds check for pending work event before queueing
relogin work to prevent redundant work to be active at the
same time.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

4 files changed, 17 insertions, 8 deletions

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 99d2afa520c2..ac2f340bc1c6 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2454,6 +2454,7 @@ static const char * const port_state_str[] = {
 #define FCF_FCP2_DEVICE		BIT_2
 #define FCF_ASYNC_SENT		BIT_3
 #define FCF_CONF_COMP_SUPPORTED BIT_4
+#define FCF_ASYNC_ACTIVE	BIT_5
 
 /* No loop ID flag. */
 #define FC_NO_LOOP_ID		0x1000
diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index abc31b983b93..546011b1a765 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3088,7 +3088,7 @@ static void qla2x00_async_gidpn_sp_done(void *s, int res)
 	u8 *id = fcport->ct_desc.ct_sns->p.rsp.rsp.gid_pn.port_id;
 	struct event_arg ea;
 
-	fcport->flags &= ~FCF_ASYNC_SENT;
+	fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
 
 	memset(&ea, 0, sizeof(ea));
 	ea.fcport = fcport;
@@ -3197,6 +3197,7 @@ int qla24xx_post_gidpn_work(struct scsi_qla_host *vha, fc_port_t *fcport)
 		return QLA_FUNCTION_FAILED;
 
 	e->u.fcport.fcport = fcport;
+	fcport->flags |= FCF_ASYNC_ACTIVE;
 	return qla2x00_post_work(vha, e);
 }
 
@@ -3209,6 +3210,7 @@ int qla24xx_post_gpsc_work(struct scsi_qla_host *vha, fc_port_t *fcport)
 		return QLA_FUNCTION_FAILED;
 
 	e->u.fcport.fcport = fcport;
+	fcport->flags |= FCF_ASYNC_ACTIVE;
 	return qla2x00_post_work(vha, e);
 }
 
@@ -3256,7 +3258,7 @@ static void qla24xx_async_gpsc_sp_done(void *s, int res)
 	    "Async done-%s res %x, WWPN %8phC \n",
 	    sp->name, res, fcport->port_name);
 
-	fcport->flags &= ~FCF_ASYNC_SENT;
+	fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
 
 	if (res == (DID_ERROR << 16)) {
 		/* entry status error */
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 93febc177aa7..956f51e78e5c 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -109,7 +109,7 @@ qla2x00_async_iocb_timeout(void *data)
 		    "Async-%s timeout - hdl=%x portid=%06x %8phC.\n",
 		    sp->name, sp->handle, fcport->d_id.b24, fcport->port_name);
 
-		fcport->flags &= ~FCF_ASYNC_SENT;
+		fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
 	} else {
 		pr_info("Async-%s timeout - hdl=%x.\n",
 		    sp->name, sp->handle);
@@ -154,7 +154,8 @@ qla2x00_async_login_sp_done(void *ptr, int res)
 	ql_dbg(ql_dbg_disc, vha, 0x20dd,
 	    "%s %8phC res %d \n", __func__, sp->fcport->port_name, res);
 
-	sp->fcport->flags &= ~FCF_ASYNC_SENT;
+	sp->fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
+
 	if (!test_bit(UNLOADING, &vha->dpc_flags)) {
 		memset(&ea, 0, sizeof(ea));
 		ea.event = FCME_PLOGI_DONE;
@@ -232,7 +233,7 @@ qla2x00_async_logout_sp_done(void *ptr, int res)
 	srb_t *sp = ptr;
 	struct srb_iocb *lio = &sp->u.iocb_cmd;
 
-	sp->fcport->flags &= ~FCF_ASYNC_SENT;
+	sp->fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
 	if (!test_bit(UNLOADING, &sp->vha->dpc_flags))
 		qla2x00_post_async_logout_done_work(sp->vha, sp->fcport,
 		    lio->u.logio.data);
@@ -665,7 +666,7 @@ qla24xx_async_gnl_sp_done(void *s, int res)
 
 	list_for_each_entry_safe(fcport, tf, &h, gnl_entry) {
 		list_del_init(&fcport->gnl_entry);
-		fcport->flags &= ~FCF_ASYNC_SENT;
+		fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
 		ea.fcport = fcport;
 
 		qla2x00_fcport_event_handler(vha, &ea);
@@ -788,6 +789,7 @@ int qla24xx_post_gnl_work(struct scsi_qla_host *vha, fc_port_t *fcport)
 		return QLA_FUNCTION_FAILED;
 
 	e->u.fcport.fcport = fcport;
+	fcport->flags |= FCF_ASYNC_ACTIVE;
 	return qla2x00_post_work(vha, e);
 }
 
@@ -805,7 +807,7 @@ void qla24xx_async_gpdb_sp_done(void *s, int res)
 	    "Async done-%s res %x, WWPN %8phC mb[1]=%x mb[2]=%x \n",
 	    sp->name, res, fcport->port_name, mb[1], mb[2]);
 
-	fcport->flags &= ~FCF_ASYNC_SENT;
+	fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
 
 	memset(&ea, 0, sizeof(ea));
 	ea.event = FCME_GPDB_DONE;
@@ -927,6 +929,7 @@ int qla24xx_post_gpdb_work(struct scsi_qla_host *vha, fc_port_t *fcport, u8 opt)
 
 	e->u.fcport.fcport = fcport;
 	e->u.fcport.opt = opt;
+	fcport->flags |= FCF_ASYNC_ACTIVE;
 	return qla2x00_post_work(vha, e);
 }
 
@@ -1516,6 +1519,7 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint32_t lun,
 
 done_free_sp:
 	sp->free(sp);
+	sp->fcport->flags &= ~FCF_ASYNC_SENT;
 done:
 	return rval;
 }
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 605100e3c6c6..a64f67a562f0 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -4697,6 +4697,7 @@ int qla2x00_post_async_##name##_work(		\
 		e->u.logio.data[0] = data[0];	\
 		e->u.logio.data[1] = data[1];	\
 	}					\
+	fcport->flags |= FCF_ASYNC_ACTIVE;	\
 	return qla2x00_post_work(vha, e);	\
 }
 
@@ -5076,7 +5077,8 @@ void qla2x00_relogin(struct scsi_qla_host *vha)
 		 * to it if we haven't run out of retries.
 		 */
 		if (atomic_read(&fcport->state) != FCS_ONLINE &&
-		    fcport->login_retry && !(fcport->flags & FCF_ASYNC_SENT)) {
+		    fcport->login_retry &&
+		    !(fcport->flags & (FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE))) {
 			if (vha->hw->current_topology != ISP_CFG_NL) {
 				ql_dbg(ql_dbg_disc, fcport->vha, 0x2108,
 				    "%s %8phC DS %d LS %d\n", __func__,