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| author |   Stefan Haberland <stefan.haberland@de.ibm.com> | 2015-12-15 10:16:43 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-02-11 13:05:53 +0100 |
| commit | 020bf042e5b397479c1174081b935d0ff15d1a64 (patch) | |
| tree | 27defbf6bd87d61e03eab2f7b888e1de1f7ebdf3 /drivers/s390 | |
| parent | s390: fix DAT off memory access, e.g. on kdump (diff) | |
| download | linux-dev-020bf042e5b397479c1174081b935d0ff15d1a64.tar.xz linux-dev-020bf042e5b397479c1174081b935d0ff15d1a64.zip | |
s390/dasd: prevent incorrect length error under z/VM after PAV changes
The channel checks the specified length and the provided amount of
data for CCWs and provides an incorrect length error if the size does
not match. Under z/VM with simulation activated the length may get
changed. Having the suppress length indication bit set is stated as
good CCW coding practice and avoids errors under z/VM.
Cc: stable@vger.kernel.org
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/block/dasd_alias.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c index 184b1dbeb554..4ff914c0f13c 100644 --- a/drivers/s390/block/dasd_alias.c +++ b/drivers/s390/block/dasd_alias.c @@ -723,7 +723,7 @@ static int reset_summary_unit_check(struct alias_lcu *lcu, ASCEBC((char *) &cqr->magic, 4); ccw = cqr->cpaddr; ccw->cmd_code = DASD_ECKD_CCW_RSCK; - ccw->flags = 0 ; + ccw->flags = CCW_FLAG_SLI; ccw->count = 16; ccw->cda = (__u32)(addr_t) cqr->data; ((char *)cqr->data)[0] = reason; |