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[PATCH] IB: Fix FMR pool crash 

Mask bits correctly from jhash result in ib_fmr_hash() so that the
computed bucket index is within our hash table.  This fixes an SDP
crash.

Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roland Dreier 2005-04-16 15:26:10 -07:00 committed by Linus Torvalds
parent dfe7cc7e81
commit de0d9641c4
1 changed files with 2 additions and 3 deletions
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5
drivers/infiniband/core/fmr_pool.c
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@ -103,9 +103,8 @@ struct ib_fmr_pool {
static inline u32 ib_fmr_hash(u64 first_page)
{
return jhash_2words((u32) first_page,
(u32) (first_page >> 32),
0);
return jhash_2words((u32) first_page, (u32) (first_page >> 32), 0) &
(IB_FMR_HASH_SIZE - 1);
}
/* Caller must hold pool_lock */