scsi: qla2xxx: Fix hang due to session stuck

commit c02aada06d19a215c8291bd968a99a270e96f734 upstream.

User experienced device lost. The log shows Get port data base command was
queued up, failed, and requeued again. Every time it is requeued, it set
the FCF_ASYNC_ACTIVE. This prevents any recovery code from occurring
because driver thinks a recovery is in progress for this session. In
essence, this session is hung.  The reason it gets into this place is the
session deletion got in front of this call due to link perturbation.

Break the requeue cycle and exit.  The session deletion code will trigger a
session relogin.

Link: https://lore.kernel.org/r/20220310092604.22950-8-njavali@marvell.com
Fixes: 726b85487067 ("qla2xxx: Add framework for async fabric discovery")
Cc: stable@vger.kernel.org
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 13600a0cc3023e81d84c3c199a8fb50377bebd01..8a8e0920d2b41e478c173f67445292faa6cc6528 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -5175,4 +5175,8 @@ struct sff_8247_a0 {
 #include "qla_gbl.h"
 #include "qla_dbg.h"
 #include "qla_inline.h"
+
+#define IS_SESSION_DELETED(_fcport) (_fcport->disc_state == DSC_DELETE_PEND || \
+                                     _fcport->disc_state == DSC_DELETED)
+
 #endif

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 3cbce3d80e44f216ac33a6ae15cc6a50cfd7d13a..203d8582c20362557a867a2be4e767564f786e2c 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -570,6 +570,14 @@ qla2x00_async_adisc(struct scsi_qla_host *vha, fc_port_t *fcport,
        struct srb_iocb *lio;
        int rval = QLA_FUNCTION_FAILED;
 
+       if (IS_SESSION_DELETED(fcport)) {
+               ql_log(ql_log_warn, vha, 0xffff,
+                      "%s: %8phC is being delete - not sending command.\n",
+                      __func__, fcport->port_name);
+               fcport->flags &= ~FCF_ASYNC_ACTIVE;
+               return rval;
+       }
+
        if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT))
                return rval;
 
@@ -1316,8 +1324,15 @@ int qla24xx_async_gpdb(struct scsi_qla_host *vha, fc_port_t *fcport, u8 opt)
        struct port_database_24xx *pd;
        struct qla_hw_data *ha = vha->hw;
 
-       if (!vha->flags.online || (fcport->flags & FCF_ASYNC_SENT) ||
-           fcport->loop_id == FC_NO_LOOP_ID) {
+       if (IS_SESSION_DELETED(fcport)) {
+               ql_log(ql_log_warn, vha, 0xffff,
+                      "%s: %8phC is being delete - not sending command.\n",
+                      __func__, fcport->port_name);
+               fcport->flags &= ~FCF_ASYNC_ACTIVE;
+               return rval;
+       }
+
+       if (!vha->flags.online || fcport->flags & FCF_ASYNC_SENT) {
                ql_log(ql_log_warn, vha, 0xffff,
                    "%s: %8phC online %d flags %x - not sending command.\n",
                    __func__, fcport->port_name, vha->flags.online, fcport->flags);