[S390] chsc: process channel-path-availability information

Update affected channel path descriptors when receiving channel path
availability information.

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

1 files changed, 34 insertions, 1 deletions

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 0689fcf23a11..75c3f1f8fd43 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -326,6 +326,36 @@ static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
         s390_process_res_acc(&link);
 }
 
+static void chsc_process_sei_chp_avail(struct chsc_sei_area *sei_area)
+{
+        struct channel_path *chp;
+        struct chp_id chpid;
+        u8 *data;
+        int num;
+
+        CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
+        if (sei_area->rs != 0)
+                return;
+        data = sei_area->ccdf;
+        chp_id_init(&chpid);
+        for (num = 0; num <= __MAX_CHPID; num++) {
+                if (!chp_test_bit(data, num))
+                        continue;
+                chpid.id = num;
+
+                CIO_CRW_EVENT(4, "Update information for channel path "
+                              "%x.%02x\n", chpid.cssid, chpid.id);
+                chp = chpid_to_chp(chpid);
+                if (!chp) {
+                        chp_new(chpid);
+                        continue;
+                }
+                mutex_lock(&chp->lock);
+                chsc_determine_base_channel_path_desc(chpid, &chp->desc);
+                mutex_unlock(&chp->lock);
+        }
+}
+
 struct chp_config_data {
         u8 map[32];
         u8 op;
@@ -376,9 +406,12 @@ static void chsc_process_sei(struct chsc_sei_area *sei_area)
         case 1: /* link incident*/
                 chsc_process_sei_link_incident(sei_area);
                 break;
-        case 2: /* i/o resource accessibiliy */
+        case 2: /* i/o resource accessibility */
                 chsc_process_sei_res_acc(sei_area);
                 break;
+        case 7: /* channel-path-availability information */
+                chsc_process_sei_chp_avail(sei_area);
+                break;
         case 8: /* channel-path-configuration notification */
                 chsc_process_sei_chp_config(sei_area);
                 break;