[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>
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index dd6385a..0eb4965 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -320,7 +320,12 @@
 		__u8 identifier:2;
 		__u8 reserved:6;
 	} __attribute__ ((packed)) flags;
-	__u8 reserved[7];
+	__u8 reserved[5];
+	struct {
+		__u8 value:2;
+		__u8 number:6;
+	} __attribute__ ((packed)) timeout;
+	__u8 reserved3;
 	__u16 subsystemID;
 	__u8 reserved2[22];
 } __attribute__ ((packed));