s390: add scm notification

Detect an scm change notification in store event information.
Update affected scm devices and notify their drivers.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 121865385c05..4d51a7c4eb8b 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -398,6 +398,20 @@ static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
         }
 }
 
+static void chsc_process_sei_scm_change(struct chsc_sei_area *sei_area)
+{
+        int ret;
+
+        CIO_CRW_EVENT(4, "chsc: scm change notification\n");
+        if (sei_area->rs != 7)
+                return;
+
+        ret = scm_update_information();
+        if (ret)
+                CIO_CRW_EVENT(0, "chsc: updating change notification"
+                              " failed (rc=%d).\n", ret);
+}
+
 static void chsc_process_sei(struct chsc_sei_area *sei_area)
 {
         /* Check if we might have lost some information. */
@@ -419,6 +433,9 @@ static void chsc_process_sei(struct chsc_sei_area *sei_area)
         case 8: /* channel-path-configuration notification */
                 chsc_process_sei_chp_config(sei_area);
                 break;
+        case 12: /* scm change notification */
+                chsc_process_sei_scm_change(sei_area);
+                break;
         default: /* other stuff */
                 CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
                               sei_area->cc);