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| author |   Mike Marciniszyn <mike.marciniszyn@qlogic.com> | 2011-09-23 13:16:39 -0400 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2011-10-21 09:38:52 -0700 |
| commit | 9e1c0e43257b6df1ef012dd37c3f0f93b1ee47af (patch) | |
| tree | be40833860d385491b1ac8fa13dffe414954ee76 /drivers/infiniband/hw/qib/qib_iba7220.c | |
| parent | IB/qib: Decode path MTU optimization (diff) | |
| download | linux-dev-9e1c0e43257b6df1ef012dd37c3f0f93b1ee47af.tar.xz linux-dev-9e1c0e43257b6df1ef012dd37c3f0f93b1ee47af.zip | |
IB/qib: Eliminate divide/mod in converting idx to egr buf pointer
The context init now saves a shift from rcvegrbufs_perchunk
rcvegrbufs_perchunk_shift using ilog2. A BUG_ON() protects the
power of 2 assumption.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_iba7220.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_iba7220.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/qib/qib_iba7220.c b/drivers/infiniband/hw/qib/qib_iba7220.c index e1f947446c2a..3f1d562ba898 100644 --- a/drivers/infiniband/hw/qib/qib_iba7220.c +++ b/drivers/infiniband/hw/qib/qib_iba7220.c @@ -4085,6 +4085,8 @@ static int qib_init_7220_variables(struct qib_devdata *dd) /* we always allocate at least 2048 bytes for eager buffers */ ret = ib_mtu_enum_to_int(qib_ibmtu); dd->rcvegrbufsize = ret != -1 ? max(ret, 2048) : QIB_DEFAULT_MTU; + BUG_ON(!is_power_of_2(dd->rcvegrbufsize)); + dd->rcvegrbufsize_shift = ilog2(dd->rcvegrbufsize); qib_7220_tidtemplate(dd); |