[S390] cio: update descriptor in chsc_chp_vary

Update the channel path descriptor at the beginning of to the
vary_on operation.

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

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 27aca3906a53..44d7cc2f9738 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -495,6 +495,7 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data)
  */
 int chsc_chp_vary(struct chp_id chpid, int on)
 {
+        struct channel_path *chp = chpid_to_chp(chpid);
         struct chp_link link;
 
         memset(&link, 0, sizeof(struct chp_link));
@@ -504,11 +505,12 @@ int chsc_chp_vary(struct chp_id chpid, int on)
         /*
          * Redo PathVerification on the devices the chpid connects to
          */
-
-        if (on)
+        if (on) {
+                /* Try to update the channel path descritor. */
+                chsc_determine_base_channel_path_desc(chpid, &chp->desc);
                 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
                                            __s390_vary_chpid_on, &link);
-        else
+        } else
                 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
                                            NULL, &link);