linux-kernel - [016/104] arm: mx28: fix bit operation in clock setting

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Date:	Wed, 07 Dec 2011 08:11:18 -0800
From:	Greg KH <gregkh@...e.de>
To:	<linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>
Cc:	<torvalds@...ux-foundation.org>, <akpm@...ux-foundation.org>,
	<alan@...rguk.ukuu.org.uk>, Wolfram Sang <w.sang@...gutronix.de>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawn.guo@...escale.com>,
	Shawn Guo <shawn.guo@...aro.org>, Arnd Bergmann <arnd@...db.de>
Subject: [016/104] arm: mx28: fix bit operation in clock setting

3.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wolfram Sang <w.sang@...gutronix.de>

commit c2735391fbc68feae10d6d14e60956c8106e725f upstream.

reg | (1 << clk->enable_shift) always evaluates to true. Switch it
to & which makes much more sense. Same fix as 13be9f00 (ARM i.MX28: fix
bit operation) at a different location.

Signed-off-by: Wolfram Sang <w.sang@...gutronix.de>
Cc: Sascha Hauer <s.hauer@...gutronix.de>
Cc: Shawn Guo <shawn.guo@...escale.com>
Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/arm/mach-mxs/clock-mx28.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/mach-mxs/clock-mx28.c
+++ b/arch/arm/mach-mxs/clock-mx28.c
@@ -404,7 +404,7 @@ static int name##_set_rate(struct clk *c
 	reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##dr);		\
 	reg &= ~BM_CLKCTRL_##dr##_DIV;					\
 	reg |= div << BP_CLKCTRL_##dr##_DIV;				\
-	if (reg | (1 << clk->enable_shift)) {				\
+	if (reg & (1 << clk->enable_shift)) {				\
 		pr_err("%s: clock is gated\n", __func__);		\
 		return -EINVAL;						\
 	}								\


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