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| author | Stefan Haberland <stefan.haberland@de.ibm.com> | 2015-12-15 10:16:43 +0100 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-03-04 10:18:40 -0500 |
| commit | ef09ae753b2a4276fcdd18d979979d386daf8739 (patch) | |
| tree | cec8a95b968ab1d035b684338f79577cc167a9f1 | |
| parent | 0c7c5f3e2aa8f3be24c64e5d50a319e2db951e9a (diff) | |
| download | lwn-ef09ae753b2a4276fcdd18d979979d386daf8739.tar.gz lwn-ef09ae753b2a4276fcdd18d979979d386daf8739.zip | |
s390/dasd: prevent incorrect length error under z/VM after PAV changes
[ Upstream commit 020bf042e5b397479c1174081b935d0ff15d1a64 ]
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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -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 a2597e683e79..d52d7a23b2e7 100644 --- a/drivers/s390/block/dasd_alias.c +++ b/drivers/s390/block/dasd_alias.c @@ -722,7 +722,7 @@ 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; |