diff options
| author | Mitko Haralanov <mitko.haralanov@intel.com> | 2012-05-07 14:03:02 -0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2012-05-14 12:39:04 -0700 |
| commit | 6ceaadee341da89af143c5cd56a3652b406e1ff5 (patch) | |
| tree | 5aa84c28c79f936d59bdcfb4475983a04799764d /drivers/infiniband/hw/qib/qib_sysfs.c | |
| parent | 4ccf28a26c981bcc6f938a7ea293a623d2d66d7b (diff) | |
IB/qib: Display correct value for number of contexts
A "fix" for a bug with the number of contexts on a single-port board
caused the calculation to be off by one, which causes problems with
the upper layers. The same problem exists for number of free
contexts, which is also fixed here.
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_sysfs.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_sysfs.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/qib/qib_sysfs.c b/drivers/infiniband/hw/qib/qib_sysfs.c index dae51604cfc..dd9cd49d097 100644 --- a/drivers/infiniband/hw/qib/qib_sysfs.c +++ b/drivers/infiniband/hw/qib/qib_sysfs.c @@ -503,8 +503,11 @@ static ssize_t show_nctxts(struct device *device, struct qib_devdata *dd = dd_from_dev(dev); /* Return the number of user ports (contexts) available. */ - return scnprintf(buf, PAGE_SIZE, "%u\n", dd->cfgctxts - - dd->first_user_ctxt); + /* The calculation below deals with a special case where + * cfgctxts is set to 1 on a single-port board. */ + return scnprintf(buf, PAGE_SIZE, "%u\n", + (dd->first_user_ctxt > dd->cfgctxts) ? 0 : + (dd->cfgctxts - dd->first_user_ctxt)); } static ssize_t show_nfreectxts(struct device *device, |