[S390] cio: fix subchannel channel-path data usage
Ensure that channel-path related subchannel data is only retrieved and
used when it is valid and that it is updated when it may have changed.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 4b3133a..71fcfdc 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -148,6 +148,7 @@
extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
extern void css_process_crw(int, int);
extern void css_reiterate_subchannels(void);
+void css_update_ssd_info(struct subchannel *sch);
#define __MAX_SUBCHANNEL 65535
#define __MAX_SSID 3