[S390] dasd: enable prefix independent of pav support

The DASD device driver needs to explicitly enable the prefix command
on the storage server, before it can be used. Originally we enabled
this command along with others only if we wanted to support PAV.
However, today we require this command for other features like
High Performance FICON as well, so we need to always enable prefix.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 5b909e6ad978690bbff0aba827a93fa1ac2b4080..abb2ec836ee87278b9bc151fe4919011987643e5 100644 (file)
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1012,9 +1012,9 @@ static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
        }
        psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
        psf_ssc_data->order = PSF_ORDER_SSC;
-       psf_ssc_data->suborder = 0x40;
+       psf_ssc_data->suborder = 0xc0;
        if (enable_pav) {
-               psf_ssc_data->suborder |= 0x88;
+               psf_ssc_data->suborder |= 0x08;
                psf_ssc_data->reserved[0] = 0x88;
        }
        ccw = cqr->cpaddr;