[SCSI] Add an 'Issue LIP' device attribute in fc_transport class

Ok, here's a patch to add such a common API for fc transport users.
Relevant LLD changes (lpfc and qla2xxx) also present.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 49696faa24fa..48e460eef05a 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -503,6 +503,15 @@ qla2x00_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout)
         rport->dev_loss_tmo = ha->port_down_retry_count + 5;
 }
 
+static int
+qla2x00_issue_lip(struct Scsi_Host *shost)
+{
+        scsi_qla_host_t *ha = to_qla_host(shost);
+
+        set_bit(LOOP_RESET_NEEDED, &ha->dpc_flags);
+        return 0;
+}
+
 struct fc_function_template qla2xxx_transport_functions = {
 
         .show_host_node_name = 1,
@@ -526,6 +535,7 @@ struct fc_function_template qla2xxx_transport_functions = {
         .set_rport_dev_loss_tmo = qla2x00_set_rport_loss_tmo,
         .show_rport_dev_loss_tmo = 1,
 
+        .issue_fc_host_lip = qla2x00_issue_lip,
 };
 
 void
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index d9eccdf4f403..b899282a856e 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2141,6 +2141,12 @@ qla2x00_do_dpc(void *data)
                             ha->host_no));
                 }
 
+                if (test_and_clear_bit(LOOP_RESET_NEEDED, &ha->dpc_flags)) {
+                        DEBUG(printk("scsi(%ld): dpc: sched loop_reset()\n",
+                            ha->host_no));
+                        qla2x00_loop_reset(ha);
+                }
+
                 if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
                     (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
 
@@ -2442,6 +2448,7 @@ qla2x00_timer(scsi_qla_host_t *ha)
         /* Schedule the DPC routine if needed */
         if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
             test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
+            test_bit(LOOP_RESET_NEEDED, &ha->dpc_flags) ||
             start_dpc ||
             test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
             test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||