[S390] css: update descriptor after hibernate

Update the channel path descriptors after hibernation.
This is done unlocked, since we are the only active
task at this time.

Note: chsc_determine_base_channel_path_desc is changed
to use spin_lock_irqsave, since it's called with
interrupts disabled in this case.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 5e1235c6aba0..771576bb2928 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -1030,7 +1030,16 @@ subsys_initcall_sync(channel_subsystem_init_sync);
 
 void channel_subsystem_reinit(void)
 {
+        struct channel_path *chp;
+        struct chp_id chpid;
+
         chsc_enable_facility(CHSC_SDA_OC_MSS);
+        chp_id_for_each(&chpid) {
+                chp = chpid_to_chp(chpid);
+                if (!chp)
+                        continue;
+                chsc_determine_base_channel_path_desc(chpid, &chp->desc);
+        }
 }
 
 #ifdef CONFIG_PROC_FS