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| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2013-06-05 18:58:35 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-06-26 21:10:14 +0200 |
| commit | da5b6cb162b6bef39d76446a5e015d6a111459b1 (patch) | |
| tree | dae7bc447358be3c4f2a25e27c9a2d2bf1e1034b /drivers/s390/cio/chsc.c | |
| parent | s390/sclp: Add SCLP character device driver (diff) | |
| download | linux-dev-da5b6cb162b6bef39d76446a5e015d6a111459b1.tar.xz linux-dev-da5b6cb162b6bef39d76446a5e015d6a111459b1.zip | |
s390/qdio: cleanup chsc SSQD usage
Cleanup the function qdio_setup_get_ssqd. Fix some possible
memleaks and an unchecked allocation and create a wrapper
for SSQD in chsc.c .
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chsc.c')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 8ea7d9b2c671..d119d0d87e9b 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -144,6 +144,29 @@ out: return ret; } +/** + * chsc_ssqd() - store subchannel QDIO data (SSQD) + * @schid: id of the subchannel on which SSQD is performed + * @ssqd: request and response block for SSQD + * + * Returns 0 on success. + */ +int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd) +{ + memset(ssqd, 0, sizeof(*ssqd)); + ssqd->request.length = 0x0010; + ssqd->request.code = 0x0024; + ssqd->first_sch = schid.sch_no; + ssqd->last_sch = schid.sch_no; + ssqd->ssid = schid.ssid; + + if (chsc(ssqd)) + return -EIO; + + return chsc_error_from_response(ssqd->response.code); +} +EXPORT_SYMBOL_GPL(chsc_ssqd); + static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data) { spin_lock_irq(sch->lock); |