[S390] dasd: tunable missing interrupt handler

This feature provides a user interface to specify the timeout for
missing interrupts for standard I/O operations.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 49b431d135e0..500678d7116c 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -186,7 +186,7 @@ struct dasd_ccw_req {
 
         /* ... and how */
         unsigned long starttime;        /* jiffies time of request start */
-        int expires;                    /* expiration period in jiffies */
+        unsigned long expires;          /* expiration period in jiffies */
         char lpm;                       /* logical path mask */
         void *data;                     /* pointer to data area */
 
@@ -224,6 +224,9 @@ struct dasd_ccw_req {
 #define DASD_CQR_CLEARED        0x84    /* request was cleared */
 #define DASD_CQR_SUCCESS        0x85    /* request was successful */
 
+/* default expiration time*/
+#define DASD_EXPIRES      300
+#define DASD_EXPIRES_MAX  40000000
 
 /* per dasd_ccw_req flags */
 #define DASD_CQR_FLAGS_USE_ERP   0      /* use ERP for this request */
@@ -404,6 +407,9 @@ struct dasd_device {
 
         /* hook for alias management */
         struct list_head alias_list;
+
+        /* default expiration time in s */
+        unsigned long default_expires;
 };
 
 struct dasd_block {