diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2008-12-25 13:39:15 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:39:11 +0100 |
| commit | d36f0c66389eb5e4dbd9b095eea252230ba3273e (patch) | |
| tree | c6c8e470455544d6f7472b86d8b2f97741257c90 | |
| parent | f444cc0e52523560a8dfc12f5374e5d5ecf5375b (diff) | |
| download | linux-d36f0c66389eb5e4dbd9b095eea252230ba3273e.tar.gz linux-d36f0c66389eb5e4dbd9b095eea252230ba3273e.tar.bz2 linux-d36f0c66389eb5e4dbd9b095eea252230ba3273e.zip | |
[S390] cio: use pim to check for multipath.
To check if multipath is available we count the bits set in lpm,
which could change over time (via configure [on|off] of a path).
The following patch uses the pim (which is persistent) for this
decision.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | drivers/s390/cio/device.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 6d714cf55064..23d5752349b5 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -1174,7 +1174,8 @@ void io_subchannel_init_config(struct subchannel *sch) { memset(&sch->config, 0, sizeof(sch->config)); sch->config.csense = 1; - if ((sch->lpm & (sch->lpm - 1)) != 0) + /* Use subchannel mp mode when there is more than 1 installed CHPID. */ + if ((sch->schib.pmcw.pim & (sch->schib.pmcw.pim - 1)) != 0) sch->config.mp = 1; } |