scsi: qla2xxx: Fix hang due to session stuck

BugLink: https://bugs.launchpad.net/bugs/1971497
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>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 161a5e7092c354b3431378201d6a7e0bf52cc30b..764948e4b64561c0ef59f570839b0e5223c3d87c 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -4872,4 +4872,8 @@ 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 26c06b63f4cb2660c0700d15a4566b427ea89d81..5f00c0c2989683c275189294eee5830b2a5e8cf7 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -572,6 +572,14 @@ 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;
 
@@ -1315,8 +1323,15 @@ 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);