diff options
| author | Vineeth Vijayan <vneethv@linux.ibm.com> | 2021-11-05 16:44:51 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-11-08 14:17:49 +0100 |
| commit | a4751f157c194431fae9e9c493f456df8272b871 (patch) | |
| tree | cd75c67830300d722dd8edb8223a23edac7a6e82 /drivers | |
| parent | 9d48c7afedf91a02d03295837ec76b2fb5e7d3fe (diff) | |
| download | linux-a4751f157c194431fae9e9c493f456df8272b871.tar.bz2 | |
s390/cio: check the subchannel validity for dev_busid
Check the validity of subchanel before reading other fields in
the schib.
Fixes: d3683c055212 ("s390/cio: add dev_busid sysfs entry for each subchannel")
CC: <stable@vger.kernel.org>
Reported-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/r/20211105154451.847288-1-vneethv@linux.ibm.com
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/cio/css.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 2bc55ccf3f23..ce9e7517430f 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -437,8 +437,8 @@ static ssize_t dev_busid_show(struct device *dev, struct subchannel *sch = to_subchannel(dev); struct pmcw *pmcw = &sch->schib.pmcw; - if ((pmcw->st == SUBCHANNEL_TYPE_IO || - pmcw->st == SUBCHANNEL_TYPE_MSG) && pmcw->dnv) + if ((pmcw->st == SUBCHANNEL_TYPE_IO && pmcw->dnv) || + (pmcw->st == SUBCHANNEL_TYPE_MSG && pmcw->w)) return sysfs_emit(buf, "0.%x.%04x\n", sch->schid.ssid, pmcw->dev); else |