From: Stefan Haberland Date: Wed, 22 Mar 2017 09:30:40 +0000 (+0100) Subject: s390/dasd: check if query host access feature is supported X-Git-Tag: v4.12-rc1~139^2~38 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ccd53fa2261c2676258fe523d9201099f4d5ebc1;p=karo-tx-linux.git s390/dasd: check if query host access feature is supported Some storage servers might not support the query host access feature. Check if the corresponding feature code is set. Signed-off-by: Stefan Haberland Signed-off-by: Martin Schwidefsky --- diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 0b38217f8147..eb090e85b02e 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -5172,6 +5172,10 @@ static int dasd_eckd_query_host_access(struct dasd_device *device, if (!device->block && private->lcu->pav == HYPER_PAV) return -EOPNOTSUPP; + /* may not be supported by the storage server */ + if (!(private->features.feature[14] & 0x80)) + return -EOPNOTSUPP; + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, sizeof(struct dasd_psf_prssd_data) + 1, device);