scsi: qla2xxx: Fix hang in task management

commit 9ae615c5bfd37bd091772969b1153de5335ea986 upstream.

Task management command hangs where a side
band chip reset failed to nudge the TMF
from it's current send path.

Add additional error check to block TMF
from entering during chip reset and along
the TMF path to cause it to bail out, skip
over abort of marker.

Cc: stable@vger.kernel.org
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://lore.kernel.org/r/20230428075339.32551-5-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.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 888bd861a2231b5c0a05529a1fc674b732a63b02..63cecd25fe43a45eb4c1af06e0c1ca1f398b4384 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -5499,4 +5499,8 @@ struct ql_vnd_tgt_stats_resp {
        _fp->disc_state, _fp->scan_state, _fp->loop_id, _fp->deleted, \
        _fp->flags
 
+#define TMF_NOT_READY(_fcport) \
+       (!_fcport || IS_SESSION_DELETED(_fcport) || atomic_read(&_fcport->state) != FCS_ONLINE || \
+       !_fcport->vha->hw->flags.fw_started)
+
 #endif

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 4987becaa87dd61b11a62d8e653f5e3f3bcc339e..30bbf33e3a6aa997cb62cac1929bb5e38fb7f72e 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1997,6 +1997,11 @@ qla2x00_tmf_iocb_timeout(void *data)
        int rc, h;
        unsigned long flags;
 
+       if (sp->type == SRB_MARKER) {
+               complete(&tmf->u.tmf.comp);
+               return;
+       }
+
        rc = qla24xx_async_abort_cmd(sp, false);
        if (rc) {
                spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
@@ -2024,6 +2029,7 @@ static void qla_marker_sp_done(srb_t *sp, int res)
                    sp->handle, sp->fcport->d_id.b24, sp->u.iocb_cmd.u.tmf.flags,
                    sp->u.iocb_cmd.u.tmf.lun, sp->qpair->id);
 
+       sp->u.iocb_cmd.u.tmf.data = res;
        complete(&tmf->u.tmf.comp);
 }
 
@@ -2040,6 +2046,11 @@ static void qla_marker_sp_done(srb_t *sp, int res)
        } while (cnt); \
 }
 
+/**
+ * qla26xx_marker: send marker IOCB and wait for the completion of it.
+ * @arg: pointer to argument list.
+ *    It is assume caller will provide an fcport pointer and modifier
+ */
 static int
 qla26xx_marker(struct tmf_arg *arg)
 {
@@ -2049,6 +2060,14 @@ qla26xx_marker(struct tmf_arg *arg)
        int rval = QLA_FUNCTION_FAILED;
        fc_port_t *fcport = arg->fcport;
 
+       if (TMF_NOT_READY(arg->fcport)) {
+               ql_dbg(ql_dbg_taskm, vha, 0x8039,
+                   "FC port not ready for marker loop-id=%x portid=%06x modifier=%x lun=%lld qp=%d.\n",
+                   fcport->loop_id, fcport->d_id.b24,
+                   arg->modifier, arg->lun, arg->qpair->id);
+               return QLA_SUSPENDED;
+       }
+
        /* ref: INIT */
        sp = qla2xxx_get_qpair_sp(vha, arg->qpair, fcport, GFP_KERNEL);
        if (!sp)
@@ -2075,11 +2094,19 @@ qla26xx_marker(struct tmf_arg *arg)
 
        if (rval != QLA_SUCCESS) {
                ql_log(ql_log_warn, vha, 0x8031,
-                   "Marker IOCB failed (%x).\n", rval);
+                   "Marker IOCB send failure (%x).\n", rval);
                goto done_free_sp;
        }
 
        wait_for_completion(&tm_iocb->u.tmf.comp);
+       rval = tm_iocb->u.tmf.data;
+
+       if (rval != QLA_SUCCESS) {
+               ql_log(ql_log_warn, vha, 0x8019,
+                   "Marker failed hdl=%x loop-id=%x portid=%06x modifier=%x lun=%lld qp=%d rval %d.\n",
+                   sp->handle, fcport->loop_id, fcport->d_id.b24,
+                   arg->modifier, arg->lun, sp->qpair->id, rval);
+       }
 
 done_free_sp:
        /* ref: INIT */
@@ -2092,6 +2119,8 @@ static void qla2x00_tmf_sp_done(srb_t *sp, int res)
 {
        struct srb_iocb *tmf = &sp->u.iocb_cmd;
 
+       if (res)
+               tmf->u.tmf.data = res;
        complete(&tmf->u.tmf.comp);
 }
 
@@ -2105,6 +2134,14 @@ __qla2x00_async_tm_cmd(struct tmf_arg *arg)
 
        fc_port_t *fcport = arg->fcport;
 
+       if (TMF_NOT_READY(arg->fcport)) {
+               ql_dbg(ql_dbg_taskm, vha, 0x8032,
+                   "FC port not ready for TM command loop-id=%x portid=%06x modifier=%x lun=%lld qp=%d.\n",
+                   fcport->loop_id, fcport->d_id.b24,
+                   arg->modifier, arg->lun, arg->qpair->id);
+               return QLA_SUSPENDED;
+       }
+
        /* ref: INIT */
        sp = qla2xxx_get_qpair_sp(vha, arg->qpair, fcport, GFP_KERNEL);
        if (!sp)
@@ -2179,7 +2216,9 @@ int qla_get_tmf(fc_port_t *fcport)
                msleep(1);
 
                spin_lock_irqsave(&ha->tgt.sess_lock, flags);
-               if (fcport->deleted) {
+               if (TMF_NOT_READY(fcport)) {
+                       ql_log(ql_log_warn, vha, 0x802c,
+                           "Unable to acquire TM resource due to disruption.\n");
                        rc = EIO;
                        break;
                }
@@ -2205,7 +2244,10 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun,
        struct scsi_qla_host *vha = fcport->vha;
        struct qla_qpair *qpair;
        struct tmf_arg a;
-       int i, rval;
+       int i, rval = QLA_SUCCESS;
+
+       if (TMF_NOT_READY(fcport))
+               return QLA_SUSPENDED;
 
        a.vha = fcport->vha;
        a.fcport = fcport;
@@ -2224,6 +2266,14 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun,
                        qpair = vha->hw->queue_pair_map[i];
                        if (!qpair)
                                continue;
+
+                       if (TMF_NOT_READY(fcport)) {
+                               ql_log(ql_log_warn, vha, 0x8026,
+                                   "Unable to send TM due to disruption.\n");
+                               rval = QLA_SUSPENDED;
+                               break;
+                       }
+
                        a.qpair = qpair;
                        a.flags = flags|TCF_NOTMCMD_TO_TARGET;
                        rval = __qla2x00_async_tm_cmd(&a);
@@ -2232,10 +2282,14 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun,
                }
        }
 
+       if (rval)
+               goto bailout;
+
        a.qpair = vha->hw->base_qpair;
        a.flags = flags;
        rval = __qla2x00_async_tm_cmd(&a);
 
+bailout:
        if (a.modifier == MK_SYNC_ID_LUN)
                qla_put_tmf(fcport);