[openib-general] [PATCH][3/6] IB: Fix FMR pool crash

[Roland Dreier]

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 at topspin.com>


--- linux-export.orig/drivers/infiniband/core/fmr_pool.c	2005-03-31 19:07:05.000000000 -0800
+++ linux-export/drivers/infiniband/core/fmr_pool.c	2005-04-01 10:08:58.240241456 -0800
@@ -103,9 +103,8 @@
 
 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 */