linux-kernel - [PATCH 32/97] dma-debug: Fix bug causing build warning

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Date:	Mon,  4 Jan 2010 16:32:45 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Ingo Molnar <mingo@...e.hu>,
	Shaun Ruffell <sruffell@...ium.com>,
	Joerg Roedel <joerg.roedel@....com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 32/97] dma-debug: Fix bug causing build warning

From: Ingo Molnar <mingo@...e.hu>

commit a8fe9ea200ea21421ea750423d1d4d4f7ce037cf upstream.

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@...ium.com>
Signed-off-by: Joerg Roedel <joerg.roedel@....com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
LKML-Reference: <20091231125624.GA14666@...ndog.tnic>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 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 dcd43e3..5a77c7c 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:
-- 
1.6.6

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