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RDMA/cxgb4: Don't exceed hw IQ depth limit for user CQs
authorSteve Wise <swise@opengridcomputing.com>
Wed, 1 Jun 2011 17:49:14 +0000 (17:49 +0000)
committerRoland Dreier <roland@purestorage.com>
Fri, 17 Jun 2011 18:52:45 +0000 (11:52 -0700)
commit2ff7d09a1b0f20f2d9c1bde0e003d4e384de2313
tree9eb1621a6806950d89496c5dde9ff36b6ae90b71tree | snapshot (tar.gz zip)
parent2c53b436a30867eb6b47dd7bab23ba638d1fb0d2commit | diff
RDMA/cxgb4: Don't exceed hw IQ depth limit for user CQs

Memory allocated for user CQs gets rounded up to the next page
boundary.  And after rounding, we recalculate the resulting IQ depth
and we need to make sure we don't exceed the HW limits.

This bug can result a much smaller CQ allocated than was expected if
the HW size field is exceeded, resulting in CQ overflow failures.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
drivers/infiniband/hw/cxgb4/cq.c diff | blob | blame | history