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| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2007-04-27 16:01:35 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-04-27 16:01:40 +0200 |
| commit | 7ad6a24970325294a22a08446d473384c15b928e (patch) | |
| tree | c8f1e25035b207e2a45a29138309acaee20d6cb6 /drivers/s390/cio/device.c | |
| parent | 83b3370c79b91b9be3f6540c3c914e689134b45f (diff) | |
| download | linux-7ad6a24970325294a22a08446d473384c15b928e.tar.gz linux-7ad6a24970325294a22a08446d473384c15b928e.tar.bz2 linux-7ad6a24970325294a22a08446d473384c15b928e.zip | |
[S390] cio: fix subchannel channel-path data usage
Ensure that channel-path related subchannel data is only retrieved and
used when it is valid and that it is updated when it may have changed.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device.c')
| -rw-r--r-- | drivers/s390/cio/device.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 34e7d77b997d..7bb44e73ea9d 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -216,12 +216,18 @@ static ssize_t chpids_show (struct device * dev, struct device_attribute *attr, char * buf) { struct subchannel *sch = to_subchannel(dev); - struct ssd_info *ssd = &sch->ssd_info; + struct chsc_ssd_info *ssd = &sch->ssd_info; ssize_t ret = 0; int chp; + int mask; - for (chp = 0; chp < 8; chp++) - ret += sprintf (buf+ret, "%02x ", ssd->chpid[chp]); + for (chp = 0; chp < 8; chp++) { + mask = 0x80 >> chp; + if (ssd->path_mask & mask) + ret += sprintf(buf + ret, "%02x ", ssd->chpid[chp].id); + else + ret += sprintf(buf + ret, "00 "); + } ret += sprintf (buf+ret, "\n"); return min((ssize_t)PAGE_SIZE, ret); } |