[PATCH] lib/dma-debug: fix bucket_find_contain

[Sebastian Ott <sebott@linux.vnet.ibm.com>]

bucket_find_contain will search the bucket list for a dma_debug_entry. When
the entry isn't found it needs to search other buckets too, since only the
start address of a dma range is hashed (which might be in a different bucket).

A copy of the dma_debug_entry is used to get the previous hash bucket but when
its list is searched the original dma_debug_entry is to be used not its
modified copy.

This fixes false "device driver tries to sync DMA memory it has not allocated"
warnings.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
---
 lib/dma-debug.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -361,7 +361,7 @@ static struct dma_debug_entry *bucket_fi
 	unsigned int range = 0;
 
 	while (range <= max_range) {
-		entry = __hash_bucket_find(*bucket, &index, containing_match);
+		entry = __hash_bucket_find(*bucket, ref, containing_match);
 
 		if (entry)
 			return entry;