[SCSI] qla2xxx: Prevent enabling target mode for unsupported HBAs.

Signed-off-by: Arun Easi <arun.easi@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

3 files changed, 8 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
index e690d052246a..f81e9385896f 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -38,7 +38,7 @@
  * | ISP82XX Specific             |       0xb084       | 0xb002,0xb024  |
  * | MultiQ                       |       0xc00c       |                |
  * | Misc                         |       0xd010       |                |
- * | Target Mode                  |       0xe06f       |                |
+ * | Target Mode                  |       0xe070       |                |
  * | Target Mode Management       |       0xf072       |                |
  * | Target Mode Task Management  |       0x1000b      |                |
  * ----------------------------------------------------------------------
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index b5fc478e90c1..5c42c9162026 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2798,6 +2798,7 @@ struct qla_hw_data {
 #define IS_PI_SPLIT_DET_CAPABLE(ha)     (IS_PI_SPLIT_DET_CAPABLE_HBA(ha) && \
     (((ha)->fw_attributes_h << 16 | (ha)->fw_attributes) & BIT_22))
 #define IS_ATIO_MSIX_CAPABLE(ha) (IS_QLA83XX(ha))
+#define IS_TGT_MODE_CAPABLE(ha) (ha->tgt.atio_q_length)
 
         /* HBA serial number */
         uint8_t         serial0;
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index cb8ea4463886..61b5d8c2b5da 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -4306,6 +4306,12 @@ int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
         if (!QLA_TGT_MODE_ENABLED())
                 return 0;
 
+        if (!IS_TGT_MODE_CAPABLE(ha)) {
+                ql_log(ql_log_warn, base_vha, 0xe070,
+                    "This adapter does not support target mode.\n");
+                return 0;
+        }
+
         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
             "Registering target for host %ld(%p)", base_vha->host_no, ha);