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>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/qib/qib_init.c b/drivers/infiniband/hw/qib/qib_init.c
index cf0cd30adc8d..dc14e100a7f1 100644
--- a/drivers/infiniband/hw/qib/qib_init.c
+++ b/drivers/infiniband/hw/qib/qib_init.c
@@ -102,6 +102,8 @@ void qib_set_ctxtcnt(struct qib_devdata *dd)
                 dd->cfgctxts = qib_cfgctxts;
         else
                 dd->cfgctxts = dd->ctxtcnt;
+        dd->freectxts = (dd->first_user_ctxt > dd->cfgctxts) ? 0 :
+                dd->cfgctxts - dd->first_user_ctxt;
 }
 
 /*
@@ -402,7 +404,6 @@ static void enable_chip(struct qib_devdata *dd)
                 if (rcd)
                         dd->f_rcvctrl(rcd->ppd, rcvmask, i);
         }
-        dd->freectxts = dd->cfgctxts - dd->first_user_ctxt;
 }
 
 static void verify_interrupt(unsigned long opaque)