[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>

1 files changed, 4 insertions, 12 deletions

diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h
index e62ab5c52863..7446c39951a7 100644
--- a/drivers/s390/cio/cio.h
+++ b/drivers/s390/cio/cio.h
@@ -1,19 +1,11 @@
 #ifndef S390_CIO_H
 #define S390_CIO_H
 
-#include "schid.h"
 #include <linux/mutex.h>
 #include <linux/device.h>
-
-/*
- * where we put the ssd info
- */
-struct ssd_info {
-        __u8  valid:1;
-        __u8  type:7;           /* subchannel type */
-        __u8  chpid[8];         /* chpids */
-        __u16 fla[8];           /* full link addresses */
-} __attribute__ ((packed));
+#include <asm/chpid.h>
+#include "chsc.h"
+#include "schid.h"
 
 /*
  * path management control word
@@ -109,7 +101,7 @@ struct subchannel {
         struct schib schib;     /* subchannel information block */
         struct orb orb;         /* operation request block */
         struct ccw1 sense_ccw;  /* static ccw for sense command */
-        struct ssd_info ssd_info;       /* subchannel description */
+        struct chsc_ssd_info ssd_info;  /* subchannel description */
         struct device dev;      /* entry in device tree */
         struct css_driver *driver;
 } __attribute__ ((aligned(8)));