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authorEli Cohen <eli@mellanox.co.il>2008-06-24 03:30:09 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-07-03 07:46:15 +0400
commit6f139f638a58706d45e1219e7625ec39608115b2 (patch)
tree3f28093396e7c3ea64c8c274d45de1ca88c5d0fa
parent935cfe235e825998eef8fd0673b1bd62fe4a85c2 (diff)
downloadlinux-sunxi-6f139f638a58706d45e1219e7625ec39608115b2.tar.xz
IB/mthca: Clear ICM pages before handing to FW
commit 87afd448b186c885d67a08b7417cd46253b6a9d6 upstream 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 [ 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: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/infiniband/hw/mthca/mthca_memfree.c6
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 252db0822f6c..0b92d3ef9511 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;