diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2019-04-17 14:44:40 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-04-29 17:24:51 -0400 |
| commit | db4bf822c58cd2b4a6718c982ce48a5292f5cc6a (patch) | |
| tree | bb9d2577cd354b067966afc3c6428821cea74f1c /drivers/scsi | |
| parent | d4556a4932a54613fd766df6879e39d0342f49a0 (diff) | |
| download | linux-db4bf822c58cd2b4a6718c982ce48a5292f5cc6a.tar.bz2 | |
scsi: qla2xxx: Complain loudly about reference count underflow
A reference count underflow is a severe bug. Hence complain loudly if a
reference count underflow happens.
Cc: Himanshu Madhani <hmadhani@marvell.com>
Cc: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_nvme.c | 15 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_os.c | 16 |
2 files changed, 7 insertions, 24 deletions
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c index 4c1112107e88..22e3fba28e51 100644 --- a/drivers/scsi/qla2xxx/qla_nvme.c +++ b/drivers/scsi/qla2xxx/qla_nvme.c @@ -131,11 +131,8 @@ static void qla_nvme_sp_ls_done(void *ptr, int res) struct nvmefc_ls_req *fd; struct nvme_private *priv; - if (atomic_read(&sp->ref_count) == 0) { - ql_log(ql_log_warn, sp->fcport->vha, 0x2123, - "SP reference-count to ZERO on LS_done -- sp=%p.\n", sp); + if (WARN_ON_ONCE(atomic_read(&sp->ref_count) == 0)) return; - } atomic_dec(&sp->ref_count); @@ -160,6 +157,9 @@ static void qla_nvme_sp_done(void *ptr, int res) nvme = &sp->u.iocb_cmd; fd = nvme->u.nvme.desc; + if (WARN_ON_ONCE(atomic_read(&sp->ref_count) == 0)) + return; + atomic_dec(&sp->ref_count); if (res == QLA_SUCCESS) { @@ -199,13 +199,8 @@ static void qla_nvme_abort_work(struct work_struct *work) return; } - if (atomic_read(&sp->ref_count) == 0) { - WARN_ON(1); - ql_log(ql_log_info, fcport->vha, 0xffff, - "%s: command already aborted on sp: %p\n", - __func__, sp); + if (WARN_ON_ONCE(atomic_read(&sp->ref_count) == 0)) return; - } rval = ha->isp_ops->abort_command(sp); diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index 73ddd02d1a39..e1c82a0a9745 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -716,14 +716,8 @@ qla2x00_sp_compl(void *ptr, int res) struct scsi_cmnd *cmd = GET_CMD_SP(sp); struct completion *comp = sp->comp; - if (atomic_read(&sp->ref_count) == 0) { - ql_dbg(ql_dbg_io, sp->vha, 0x3015, - "SP reference-count to ZERO -- sp=%p cmd=%p.\n", - sp, GET_CMD_SP(sp)); - if (ql2xextended_error_logging & ql_dbg_io) - WARN_ON(atomic_read(&sp->ref_count) == 0); + if (WARN_ON_ONCE(atomic_read(&sp->ref_count) == 0)) return; - } atomic_dec(&sp->ref_count); @@ -827,14 +821,8 @@ qla2xxx_qpair_sp_compl(void *ptr, int res) struct scsi_cmnd *cmd = GET_CMD_SP(sp); struct completion *comp = sp->comp; - if (atomic_read(&sp->ref_count) == 0) { - ql_dbg(ql_dbg_io, sp->fcport->vha, 0x3079, - "SP reference-count to ZERO -- sp=%p cmd=%p.\n", - sp, GET_CMD_SP(sp)); - if (ql2xextended_error_logging & ql_dbg_io) - WARN_ON(atomic_read(&sp->ref_count) == 0); + if (WARN_ON_ONCE(atomic_read(&sp->ref_count) == 0)) return; - } atomic_dec(&sp->ref_count); |