From: stigge@antcom.de (stigge at antcom.de)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 4/7] ARM: LPC32xx: clock.c: jiffies wrapping
Date: Thu, 2 Feb 2012 20:19:45 +0100 [thread overview]
Message-ID: <1328210388-21296-4-git-send-email-stigge@antcom.de> (raw)
In-Reply-To: <1328210388-21296-1-git-send-email-stigge@antcom.de>
This patch fixes the jiffies wrapping bug in clock.c.
It corrects the timeout computation based on jiffies, uses time_before() for
correct wrapping handling and replaces a binary "&" which should really be a
logical "&&" in a truth expression.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
diff --git a/arch/arm/mach-lpc32xx/clock.c b/arch/arm/mach-lpc32xx/clock.c
index 8e79313..f64c9a1 100644
--- a/arch/arm/mach-lpc32xx/clock.c
+++ b/arch/arm/mach-lpc32xx/clock.c
@@ -128,7 +128,7 @@ static struct clk osc_32KHz = {
static int local_pll397_enable(struct clk *clk, int enable)
{
u32 reg;
- unsigned long timeout = 1 + msecs_to_jiffies(10);
+ unsigned long timeout = jiffies + msecs_to_jiffies(10);
reg = __raw_readl(LPC32XX_CLKPWR_PLL397_CTRL);
@@ -143,7 +143,7 @@ static int local_pll397_enable(struct clk *clk, int enable)
/* Wait for PLL397 lock */
while (((__raw_readl(LPC32XX_CLKPWR_PLL397_CTRL) &
LPC32XX_CLKPWR_SYSCTRL_PLL397_STS) == 0) &&
- (timeout > jiffies))
+ time_before(jiffies, timeout))
cpu_relax();
if ((__raw_readl(LPC32XX_CLKPWR_PLL397_CTRL) &
@@ -157,7 +157,7 @@ static int local_pll397_enable(struct clk *clk, int enable)
static int local_oscmain_enable(struct clk *clk, int enable)
{
u32 reg;
- unsigned long timeout = 1 + msecs_to_jiffies(10);
+ unsigned long timeout = jiffies + msecs_to_jiffies(10);
reg = __raw_readl(LPC32XX_CLKPWR_MAIN_OSC_CTRL);
@@ -172,7 +172,7 @@ static int local_oscmain_enable(struct clk *clk, int enable)
/* Wait for main oscillator to start */
while (((__raw_readl(LPC32XX_CLKPWR_MAIN_OSC_CTRL) &
LPC32XX_CLKPWR_MOSC_DISABLE) != 0) &&
- (timeout > jiffies))
+ time_before(jiffies, timeout))
cpu_relax();
if ((__raw_readl(LPC32XX_CLKPWR_MAIN_OSC_CTRL) &
@@ -384,7 +384,7 @@ static int local_usbpll_enable(struct clk *clk, int enable)
{
u32 reg;
int ret = -ENODEV;
- unsigned long timeout = 1 + msecs_to_jiffies(10);
+ unsigned long timeout = jiffies + msecs_to_jiffies(10);
reg = __raw_readl(LPC32XX_CLKPWR_USB_CTRL);
@@ -397,7 +397,7 @@ static int local_usbpll_enable(struct clk *clk, int enable)
__raw_writel(reg, LPC32XX_CLKPWR_USB_CTRL);
/* Wait for PLL lock */
- while ((timeout > jiffies) & (ret == -ENODEV)) {
+ while (time_before(jiffies, timeout) && (ret == -ENODEV)) {
reg = __raw_readl(LPC32XX_CLKPWR_USB_CTRL);
if (reg & LPC32XX_CLKPWR_USBCTRL_PLL_STS)
ret = 0;
next prev parent reply other threads:[~2012-02-02 19:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-02 19:19 [PATCH v3 1/7] ARM: LPC32xx: Added lpc32xx_defconfig stigge at antcom.de
2012-02-02 19:19 ` [PATCH v3 2/7] ARM: LPC32XX: Remove broken non-static declaration stigge at antcom.de
2012-02-02 19:19 ` [PATCH v3 3/7] ARM: LPC32xx: clock.c: Missing header file stigge at antcom.de
2012-02-02 19:19 ` stigge at antcom.de [this message]
2012-02-02 19:19 ` [PATCH v3 5/7] ARM: LPC32xx: clock.c: Clock registration fixes stigge at antcom.de
2012-02-02 19:19 ` [PATCH v3 6/7] ARM: LPC32xx: clock.c: warning fix stigge at antcom.de
2012-02-02 19:19 ` [PATCH v3 7/7] ARM: LPC32xx: clock.c: Fix mutex lock issues stigge at antcom.de
2012-02-02 21:23 ` [PATCH v3 1/7] ARM: LPC32xx: Added lpc32xx_defconfig Wolfram Sang
2012-02-02 21:52 ` Kevin Wells
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