diff options
| author | Eli Cohen <eli@mellanox.co.il> | 2008-06-23 09:29:58 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-06-23 09:29:58 -0700 |
| commit | 87afd448b186c885d67a08b7417cd46253b6a9d6 (patch) | |
| tree | 763ae0a3f10879482ad414c192ac2be4d60a2b90 /drivers | |
| parent | f9d1c6ca2bb1bbfde4a95d9e55ab3b0126825295 (diff) | |
IB/mthca: Clear ICM pages before handing to FW
Current memfree FW has a bug which in some cases, assumes that ICM
pages passed to it are cleared. This patch uses __GFP_ZERO to
allocate all ICM pages passed to the FW. Once firmware with a fix is
released, we can make the workaround conditional on firmware version.
This fixes the bug reported by Arthur Kepner <akepner@sgi.com> here:
http://lists.openfabrics.org/pipermail/general/2008-May/050026.html
Cc: <stable@kernel.org>
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
[ Rewritten to be a one-liner using __GFP_ZERO instead of vmap()ing
ICM memory and memset()ing it to 0. - Roland ]
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_memfree.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c index b224079d4e1..d5862e5d99a 100644 --- a/drivers/infiniband/hw/mthca/mthca_memfree.c +++ b/drivers/infiniband/hw/mthca/mthca_memfree.c @@ -109,7 +109,11 @@ static int mthca_alloc_icm_pages(struct scatterlist *mem, int order, gfp_t gfp_m { struct page *page; - page = alloc_pages(gfp_mask, order); + /* + * Use __GFP_ZERO because buggy firmware assumes ICM pages are + * cleared, and subtle failures are seen if they aren't. + */ + page = alloc_pages(gfp_mask | __GFP_ZERO, order); if (!page) return -ENOMEM; |