omap: gpio: fix incorrect matching of IRQ_TYPE_EDGE_BOTH

Since IRQ_TYPE_EDGE_BOTH is defined as (IRQ_TYPE_EDGE_FALLING |
IRQ_TYPE_EDGE_RISING), testing against it with a bitwise AND also matches
both single-edge cases in addition to the intended both edges case. Fix it,
replacing with a more accurate expression.

Created and tested againts linux-2.6.34-rc3.
Applicable to 2.6.33-stable as well.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 76a347b3ce07..45a225d09125 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -798,7 +798,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
         case METHOD_MPUIO:
                 reg += OMAP_MPUIO_GPIO_INT_EDGE;
                 l = __raw_readl(reg);
-                if (trigger & IRQ_TYPE_EDGE_BOTH)
+                if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
                         bank->toggle_mask |= 1 << gpio;
                 if (trigger & IRQ_TYPE_EDGE_RISING)
                         l |= 1 << gpio;
@@ -812,7 +812,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
         case METHOD_GPIO_1510:
                 reg += OMAP1510_GPIO_INT_CONTROL;
                 l = __raw_readl(reg);
-                if (trigger & IRQ_TYPE_EDGE_BOTH)
+                if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
                         bank->toggle_mask |= 1 << gpio;
                 if (trigger & IRQ_TYPE_EDGE_RISING)
                         l |= 1 << gpio;
@@ -846,7 +846,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
         case METHOD_GPIO_7XX:
                 reg += OMAP7XX_GPIO_INT_CONTROL;
                 l = __raw_readl(reg);
-                if (trigger & IRQ_TYPE_EDGE_BOTH)
+                if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
                         bank->toggle_mask |= 1 << gpio;
                 if (trigger & IRQ_TYPE_EDGE_RISING)
                         l |= 1 << gpio;