linux-kernel - [PATCH] arm: tegra: fix error check in tegra2

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Date:	Wed, 30 Mar 2011 15:59:11 +0200
From:	Nicolas Kaiser <nikai@...ai.net>
To:	Colin Cross <ccross@...roid.com>
Cc:	Erik Gilling <konkers@...roid.com>,
	Olof Johansson <olof@...om.net>, linux-tegra@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm: tegra: fix error check in tegra2_clocks.c

Checking 'rate < 0' doesn't work because 'rate' is unsigned.

Signed-off-by: Nicolas Kaiser <nikai@...ai.net>
---
Untested.

 arch/arm/mach-tegra/tegra2_clocks.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-tegra/tegra2_clocks.c b/arch/arm/mach-tegra/tegra2_clocks.c
index 6d7c4ee..4459470 100644
--- a/arch/arm/mach-tegra/tegra2_clocks.c
+++ b/arch/arm/mach-tegra/tegra2_clocks.c
@@ -1362,14 +1362,15 @@ static int tegra_clk_shared_bus_set_rate(struct clk *c, unsigned long rate)
 {
 	unsigned long flags;
 	int ret;
+	long new_rate = rate;
 
-	rate = clk_round_rate(c->parent, rate);
-	if (rate < 0)
-		return rate;
+	new_rate = clk_round_rate(c->parent, new_rate);
+	if (new_rate < 0)
+		return new_rate;
 
 	spin_lock_irqsave(&c->parent->spinlock, flags);
 
-	c->u.shared_bus_user.rate = rate;
+	c->u.shared_bus_user.rate = new_rate;
 	ret = tegra_clk_shared_bus_update(c->parent);
 
 	spin_unlock_irqrestore(&c->parent->spinlock, flags);
-- 
1.7.3.4
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