Check scsi tracker for NULL before accessing it.
And in some places there are possibilities for getting valid st
but still other fields are not set.
Signed-off-by: Chaitra P B <chaitra.basappa@xxxxxxxxxxxx>
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@xxxxxxxxxxxx>
---
drivers/scsi/mpt3sas/mpt3sas_ctl.c | 5 ++++-
drivers/scsi/mpt3sas/mpt3sas_scsih.c | 9 ++++++++-
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
index c1b17d6..2f27d5c 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
@@ -590,7 +590,8 @@ _ctl_set_task_mid(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command *karg,
struct scsiio_tracker *st;
scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
- if (!scmd)
+ if (scmd == NULL || scmd->device == NULL ||
+ scmd->device->hostdata == NULL)
continue;
if (lun != scmd->device->lun)
continue;
@@ -600,6 +601,8 @@ _ctl_set_task_mid(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command *karg,
if (priv_data->sas_target->handle != handle)
continue;
st = scsi_cmd_priv(scmd);
+ if ((!st) || (st->smid == 0))
+ continue;
tm_request->TaskMID = cpu_to_le16(st->smid);
found = 1;
}
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index c9cce65..6b1aaa0 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -1465,7 +1465,7 @@ mpt3sas_scsih_scsi_lookup_get(struct MPT3SAS_ADAPTER *ioc, u16 smid)
scmd = scsi_host_find_tag(ioc->shost, unique_tag);
if (scmd) {
st = scsi_cmd_priv(scmd);
- if (st->cb_idx == 0xFF)
+ if ((!st) || (st->cb_idx == 0xFF) || (st->smid == 0))
scmd = NULL;
}
}
@@ -4451,6 +4451,13 @@ _scsih_flush_running_cmds(struct MPT3SAS_ADAPTER *ioc)
count++;
_scsih_set_satl_pending(scmd, false);
st = scsi_cmd_priv(scmd);
+ /*
+ * It may be possible that SCSI scmd got prepared by SML
+ * but it has not issued to the driver, for these type of
+ * scmd's don't do anything"
+ */
+ if (st && st->smid == 0)
+ continue;
mpt3sas_base_clear_st(ioc, st);
scsi_dma_unmap(scmd);
if (ioc->pci_error_recovery)
--
1.8.3.1