linux-kernel - [PATCH] clk: mvebu: Fix valid value range checking for cpu_freq

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Message-ID: <1365392582.16955.1.camel@phoenix>
Date:	Mon, 08 Apr 2013 11:43:02 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Mike Turquette <mturquette@...aro.org>
Cc:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Andrew Lunn <andrew@...n.ch>, linux-kernel@...r.kernel.org
Subject: [PATCH] clk: mvebu: Fix valid value range checking for
 cpu_freq_select

cpu_freq_select is used as array subscript, thus the valid value range
is 0 ... ARRAY_SIZE() - 1.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/clk/mvebu/clk-core.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/mvebu/clk-core.c b/drivers/clk/mvebu/clk-core.c
index 1b4e333..0a53edb 100644
--- a/drivers/clk/mvebu/clk-core.c
+++ b/drivers/clk/mvebu/clk-core.c
@@ -156,7 +156,7 @@ static u32 __init armada_370_get_cpu_freq(void __iomem *sar)
 
 	cpu_freq_select = ((readl(sar) >> SARL_A370_PCLK_FREQ_OPT) &
 			   SARL_A370_PCLK_FREQ_OPT_MASK);
-	if (cpu_freq_select > ARRAY_SIZE(armada_370_cpu_frequencies)) {
+	if (cpu_freq_select >= ARRAY_SIZE(armada_370_cpu_frequencies)) {
 		pr_err("CPU freq select unsupported %d\n", cpu_freq_select);
 		cpu_freq = 0;
 	} else
@@ -278,7 +278,7 @@ static u32 __init armada_xp_get_cpu_freq(void __iomem *sar)
 	cpu_freq_select |= (((readl(sar+4) >> SARH_AXP_PCLK_FREQ_OPT) &
 			     SARH_AXP_PCLK_FREQ_OPT_MASK)
 			    << SARH_AXP_PCLK_FREQ_OPT_SHIFT);
-	if (cpu_freq_select > ARRAY_SIZE(armada_xp_cpu_frequencies)) {
+	if (cpu_freq_select >= ARRAY_SIZE(armada_xp_cpu_frequencies)) {
 		pr_err("CPU freq select unsupported: %d\n", cpu_freq_select);
 		cpu_freq = 0;
 	} else
-- 
1.7.10.4



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