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authorSebastian Ott <sebott@linux.vnet.ibm.com>2011-12-01 13:32:20 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-12-01 13:32:18 +0100
commit659213b899f389d3a1e211796713ceaaa280fa44 (patch)
tree730f1ab0d4124f8783f7a83afea67b762e2007e6 /drivers/s390
parent817e5000ebc4d448ca514db49b55073a724f8552 (diff)
downloadop-kernel-dev-659213b899f389d3a1e211796713ceaaa280fa44.zip
op-kernel-dev-659213b899f389d3a1e211796713ceaaa280fa44.tar.gz
[S390] cio: disallow driver io for known to be broken paths
When a driver requests to do IO, we will adjust the mask of paths to be used to exclude varied offline paths. Drivers trying to do IO solely on paths which are online but some way defective may lack the information to do proper error handling. There is no reason to allow the usage of known to be broken paths. Thus restrict the paths a ccw driver can use for IO to a subset of the paths cio found usable (this also excludes offline paths). Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/device_ops.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index f98698d..41c21ad 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -213,9 +213,9 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
ret = cio_set_options (sch, flags);
if (ret)
return ret;
- /* Adjust requested path mask to excluded varied off paths. */
+ /* Adjust requested path mask to exclude unusable paths. */
if (lpm) {
- lpm &= sch->opm;
+ lpm &= sch->lpm;
if (lpm == 0)
return -EACCES;
}
@@ -607,9 +607,9 @@ int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw,
return -EINVAL;
if (cdev->private->state != DEV_STATE_ONLINE)
return -EIO;
- /* Adjust requested path mask to excluded varied off paths. */
+ /* Adjust requested path mask to exclude unusable paths. */
if (lpm) {
- lpm &= sch->opm;
+ lpm &= sch->lpm;
if (lpm == 0)
return -EACCES;
}
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