diff options
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index 4aed5ed70836..ffd77230dce9 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -241,6 +241,13 @@ struct dasd_ccw_req { typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); /* + * A single CQR can only contain a maximum of 255 CCWs. It is limited by + * the locate record and locate record extended count value which can only hold + * 1 Byte max. + */ +#define DASD_CQR_MAX_CCW 255 + +/* * Unique identifier for dasd device. */ #define UA_NOT_CONFIGURED 0x00 |