[SCSI] qla4xxx: Print WARN_ONCE() if iSCSI function presence bit removed

Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

3 files changed, 26 insertions, 0 deletions

diff --git a/drivers/scsi/qla4xxx/ql4_83xx.c b/drivers/scsi/qla4xxx/ql4_83xx.c
index 919284834ad7..c105b6eebf2b 100644
--- a/drivers/scsi/qla4xxx/ql4_83xx.c
+++ b/drivers/scsi/qla4xxx/ql4_83xx.c
@@ -1664,3 +1664,23 @@ void qla4_83xx_disable_pause(struct scsi_qla_host *ha)
         __qla4_83xx_disable_pause(ha);
         ha->isp_ops->idc_unlock(ha);
 }
+
+/**
+ * qla4_83xx_is_detached - Check if we are marked invisible.
+ * @ha: Pointer to host adapter structure.
+ **/
+int qla4_83xx_is_detached(struct scsi_qla_host *ha)
+{
+        uint32_t drv_active;
+
+        drv_active = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DRV_ACTIVE);
+
+        if (test_bit(AF_INIT_DONE, &ha->flags) &&
+            !(drv_active & (1 << ha->func_num))) {
+                DEBUG2(ql4_printk(KERN_INFO, ha, "%s: drv_active = 0x%X\n",
+                                  __func__, drv_active));
+                return QLA_SUCCESS;
+        }
+
+        return QLA_ERROR;
+}
diff --git a/drivers/scsi/qla4xxx/ql4_glbl.h b/drivers/scsi/qla4xxx/ql4_glbl.h
index 6d72e1dde19f..b1a19cd8d5b2 100644
--- a/drivers/scsi/qla4xxx/ql4_glbl.h
+++ b/drivers/scsi/qla4xxx/ql4_glbl.h
@@ -280,6 +280,7 @@ uint8_t qla4xxx_set_ipaddr_state(uint8_t fw_ipaddr_state);
 int qla4_83xx_get_port_config(struct scsi_qla_host *ha, uint32_t *config);
 int qla4_83xx_set_port_config(struct scsi_qla_host *ha, uint32_t *config);
 int qla4_8xxx_check_init_adapter_retry(struct scsi_qla_host *ha);
+int qla4_83xx_is_detached(struct scsi_qla_host *ha);
 
 extern int ql4xextended_error_logging;
 extern int ql4xdontresethba;
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 9803c9e3bc39..e6fa19cc0d32 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -4372,6 +4372,11 @@ void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
         uint32_t dev_state;
         uint32_t idc_ctrl;
 
+        if (is_qla8032(ha) &&
+            (qla4_83xx_is_detached(ha) == QLA_SUCCESS))
+                WARN_ONCE(1, "%s: iSCSI function %d marked invisible\n",
+                          __func__, ha->func_num);
+
         /* don't poll if reset is going on */
         if (!(test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
             test_bit(DPC_RESET_HA, &ha->dpc_flags) ||