[tip:x86/urgent] dma-debug: Fix bug causing build warning

[tip-bot for Ingo Molnar <mingo@elte.hu>]

Commit-ID:  a8fe9ea200ea21421ea750423d1d4d4f7ce037cf
Gitweb:     http://git.kernel.org/tip/a8fe9ea200ea21421ea750423d1d4d4f7ce037cf
Author:     Ingo Molnar <mingo@elte.hu>
AuthorDate: Thu, 31 Dec 2009 15:16:23 +0100
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 31 Dec 2009 15:16:23 +0100

dma-debug: Fix bug causing build warning

Stephen Rothwell reported the following build warning:

 lib/dma-debug.c: In function 'dma_debug_device_change':
 lib/dma-debug.c:680: warning: 'return' with no value, in function returning non-void

Introduced by commit f797d9881b62c2ddb1d2e7bd80d87141949c84aa
("dma-debug: Do not add notifier when dma debugging is disabled").

Return 0 [notify-done] when disabled. (this is standard bus notifier behavior.)

Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@kernel.org>
LKML-Reference: <20091231125624.GA14666@liondog.tnic>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 lib/dma-debug.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 7399744..cf90620 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -670,14 +670,13 @@ static int device_dma_allocations(struct device *dev)
 	return count;
 }
 
-static int dma_debug_device_change(struct notifier_block *nb,
-				    unsigned long action, void *data)
+static int dma_debug_device_change(struct notifier_block *nb, unsigned long action, void *data)
 {
 	struct device *dev = data;
 	int count;
 
 	if (global_disable)
-		return;
+		return 0;
 
 	switch (action) {
 	case BUS_NOTIFY_UNBOUND_DRIVER: