This is a note to let you know that I've just added the patch titled
scsi: qla2xxx: Fix task management cmd fail due to unavailable resource
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-qla2xxx-fix-task-management-cmd-fail-due-to-una.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit cc2d6f72c6b995159aecc843410b558cf9f36ee8
Author: Quinn Tran <qutran@xxxxxxxxxxx>
Date: Fri Apr 28 00:53:35 2023 -0700
scsi: qla2xxx: Fix task management cmd fail due to unavailable resource
[ Upstream commit 6a87679626b51b53fbb6be417ad8eb083030b617 ]
Task management command failed with status 2Ch which is
a result of too many task management commands sent
to the same target. Hence limit task management commands
to 8 per target.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Link: https://lore.kernel.org/oe-kbuild-all/202304271952.NKNmoFzv-lkp@xxxxxxxxx/
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Quinn Tran <qutran@xxxxxxxxxxx>
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230428075339.32551-4-njavali@xxxxxxxxxxx
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index ca63aa8f33b5d..bbeb116c16cc3 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2523,6 +2523,7 @@ enum rscn_addr_format {
typedef struct fc_port {
struct list_head list;
struct scsi_qla_host *vha;
+ struct list_head tmf_pending;
unsigned int conf_compl_supported:1;
unsigned int deleted:2;
@@ -2543,6 +2544,8 @@ typedef struct fc_port {
unsigned int do_prli_nvme:1;
uint8_t nvme_flag;
+ uint8_t active_tmf;
+#define MAX_ACTIVE_TMF 8
uint8_t node_name[WWN_SIZE];
uint8_t port_name[WWN_SIZE];
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 9d9b16f7f34a6..2c42ecb2a64a5 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -2151,6 +2151,54 @@ __qla2x00_async_tm_cmd(struct tmf_arg *arg)
return rval;
}
+static void qla_put_tmf(fc_port_t *fcport)
+{
+ struct scsi_qla_host *vha = fcport->vha;
+ struct qla_hw_data *ha = vha->hw;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ha->tgt.sess_lock, flags);
+ fcport->active_tmf--;
+ spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
+}
+
+static
+int qla_get_tmf(fc_port_t *fcport)
+{
+ struct scsi_qla_host *vha = fcport->vha;
+ struct qla_hw_data *ha = vha->hw;
+ unsigned long flags;
+ int rc = 0;
+ LIST_HEAD(tmf_elem);
+
+ spin_lock_irqsave(&ha->tgt.sess_lock, flags);
+ list_add_tail(&tmf_elem, &fcport->tmf_pending);
+
+ while (fcport->active_tmf >= MAX_ACTIVE_TMF) {
+ spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
+
+ msleep(1);
+
+ spin_lock_irqsave(&ha->tgt.sess_lock, flags);
+ if (fcport->deleted) {
+ rc = EIO;
+ break;
+ }
+ if (fcport->active_tmf < MAX_ACTIVE_TMF &&
+ list_is_first(&tmf_elem, &fcport->tmf_pending))
+ break;
+ }
+
+ list_del(&tmf_elem);
+
+ if (!rc)
+ fcport->active_tmf++;
+
+ spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
+
+ return rc;
+}
+
int
qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun,
uint32_t tag)
@@ -2158,18 +2206,19 @@ 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;
- struct completion comp;
int i, rval;
- init_completion(&comp);
a.vha = fcport->vha;
a.fcport = fcport;
a.lun = lun;
-
- if (flags & (TCF_LUN_RESET|TCF_ABORT_TASK_SET|TCF_CLEAR_TASK_SET|TCF_CLEAR_ACA))
+ if (flags & (TCF_LUN_RESET|TCF_ABORT_TASK_SET|TCF_CLEAR_TASK_SET|TCF_CLEAR_ACA)) {
a.modifier = MK_SYNC_ID_LUN;
- else
+
+ if (qla_get_tmf(fcport))
+ return QLA_FUNCTION_FAILED;
+ } else {
a.modifier = MK_SYNC_ID;
+ }
if (vha->hw->mqenable) {
for (i = 0; i < vha->hw->num_qpairs; i++) {
@@ -2188,6 +2237,9 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun,
a.flags = flags;
rval = __qla2x00_async_tm_cmd(&a);
+ if (a.modifier == MK_SYNC_ID_LUN)
+ qla_put_tmf(fcport);
+
return rval;
}
@@ -5423,6 +5475,7 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vha, gfp_t flags)
INIT_WORK(&fcport->reg_work, qla_register_fcport_fn);
INIT_LIST_HEAD(&fcport->gnl_entry);
INIT_LIST_HEAD(&fcport->list);
+ INIT_LIST_HEAD(&fcport->tmf_pending);
INIT_LIST_HEAD(&fcport->sess_cmd_list);
spin_lock_init(&fcport->sess_cmd_lock);
