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Date: Tue, 16 Oct 2007 17:26:54 +0200 From: Joachim Fenkes <fenkes@...ibm.com> To: "LinuxPPC-Dev" <linuxppc-dev@...abs.org>, LKML <linux-kernel@...r.kernel.org>, "OF-General" <general@...ts.openfabrics.org>, "OF-EWG" <ewg@...ts.openfabrics.org> Cc: Roland Dreier <rolandd@...co.com>, "Hoang-Nam Nguyen" <hnguyen@...ibm.com>, Christoph Raisch <raisch@...ibm.com>, Stefan Roscher <stefan.roscher@...ibm.com> Subject: [PATCH 3/5] IB/ehca: Fix ehca_encode_hwpage_size() and alloc_fmr() Simplify ehca_encode_hwpage_size(), fixing an infinite loop for pgsize == 0 in the process. Fix the bug in alloc_fmr() that triggered the loop. Signed-off-by: Joachim Fenkes <fenkes@...ibm.com> --- drivers/infiniband/hw/ehca/ehca_mrmw.c | 15 ++++----------- 1 files changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c index 16c9efd..b9a788c 100644 --- a/drivers/infiniband/hw/ehca/ehca_mrmw.c +++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c @@ -72,17 +72,9 @@ enum ehca_mr_pgsize { static u32 ehca_encode_hwpage_size(u32 pgsize) { - u32 idx = 0; - pgsize >>= 12; - /* - * map mr page size into hw code: - * 0, 1, 2, 3 for 4K, 64K, 1M, 64M - */ - while (!(pgsize & 1)) { - idx++; - pgsize >>= 4; - } - return idx; + int log = ilog2(pgsize); + WARN_ON(log < 12 || log > 24 || log & 3); + return (log - 12) / 4; } static u64 ehca_get_max_hwpage_size(struct ehca_shca *shca) @@ -826,6 +818,7 @@ struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd, /* register MR on HCA */ memset(&pginfo, 0, sizeof(pginfo)); + pginfo.hwpage_size = hw_pgsize; /* * pginfo.num_hwpages==0, ie register_rpages() will not be called * but deferred to map_phys_fmr() -- 1.5.2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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