[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/chsc.h b/drivers/s390/cio/chsc.h
index 742ef57..2ad81d1 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -4,6 +4,7 @@
#include <linux/types.h>
#include <linux/device.h>
#include <asm/chpid.h>
+#include "schid.h"
#define CHSC_SDA_OC_MSS 0x2
@@ -35,7 +36,6 @@
struct channel_path;
-extern int css_get_ssd_info(struct subchannel *);
extern void chsc_process_crw(void);
struct css_general_char {
@@ -69,6 +69,14 @@
extern struct css_general_char css_general_characteristics;
extern struct css_chsc_char css_chsc_characteristics;
+struct chsc_ssd_info {
+ u8 path_mask;
+ u8 fla_valid_mask;
+ struct chp_id chpid[8];
+ u16 fla[8];
+};
+extern int chsc_get_ssd_info(struct subchannel_id schid,
+ struct chsc_ssd_info *ssd);
extern int chsc_determine_css_characteristics(void);
extern int css_characteristics_avail;