linux-kernel - [PATCH] mach-davinci: signedness bug

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Date:	Mon, 15 Nov 2010 19:40:28 +0100
From:	Nicolas Kaiser <nikai@...ai.net>
To:	Kevin Hilman <khilman@...prootsystems.com>
Cc:	Sekhar Nori <nsekhar@...com>,
	davinci-linux-open-source@...ux.davincidsp.com,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mach-davinci: signedness bug

aemif_calc_rate() can return a negative error value, so all the
variables that get tested for this value need to be signed.

The maximum bit width of WSETUP(WSETUP_MAX) appears to be 30 bits
(0xf << 26). Using a signed instead of an unsigned integer
shouldn't make a difference here.

Signed-off-by: Nicolas Kaiser <nikai@...ai.net>
---
 arch/arm/mach-davinci/aemif.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-davinci/aemif.c b/arch/arm/mach-davinci/aemif.c
index 9c3f500..1ce70a9 100644
--- a/arch/arm/mach-davinci/aemif.c
+++ b/arch/arm/mach-davinci/aemif.c
@@ -90,7 +90,7 @@ int davinci_aemif_setup_timing(struct davinci_aemif_timing *t,
 					void __iomem *base, unsigned cs)
 {
 	unsigned set, val;
-	unsigned ta, rhold, rstrobe, rsetup, whold, wstrobe, wsetup;
+	int ta, rhold, rstrobe, rsetup, whold, wstrobe, wsetup;
 	unsigned offset = A1CR_OFFSET + cs * 4;
 	struct clk *aemif_clk;
 	unsigned long clkrate;
-- 
1.7.2.2
--
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