tree d34cfab8c8e31e1332a5fdba300f464a7cb86d2b
parent 7c43d9a30c527d9e06e2c55f82b56f28df43caed
author Sebastian Ott <sebott@linux.vnet.ibm.com> 1429213405 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1429275834 -0400

lib/dma-debug: fix bucket_find_contain()

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>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Horia Geanta <horia.geanta@freescale.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>