[PATCH] chardev: GPIO for SCx200 & PC-8736x: replace spinlocks w mutexes

[cascardo/linux.git] / drivers / char / pc8736x_gpio.c

diff --git a/drivers/char/pc8736x_gpio.c b/drivers/char/pc8736x_gpio.c
index b8183d5..72dcf22 100644 (file)
--- a/drivers/char/pc8736x_gpio.c
+++ b/drivers/char/pc8736x_gpio.c
@@ -16,6 +16,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
+#include <linux/mutex.h>
 #include <linux/nsc_gpio.h>
 #include <linux/platform_device.h>
 #include <asm/uaccess.h>
@@ -31,7 +32,7 @@ static int major;             /* default to dynamic major */
 module_param(major, int, 0);
 MODULE_PARM_DESC(major, "Major device number");
 
-static DEFINE_SPINLOCK(pc8736x_gpio_config_lock);
+static DEFINE_MUTEX(pc8736x_gpio_config_lock);
 static unsigned pc8736x_gpio_base;
 static u8 pc8736x_gpio_shadow[4];
 
@@ -119,9 +120,8 @@ static inline u32 pc8736x_gpio_configure_fn(unsigned index, u32 mask, u32 bits,
                                            u32 func_slct)
 {
        u32 config, new_config;
-       unsigned long flags;
 
-       spin_lock_irqsave(&pc8736x_gpio_config_lock, flags);
+       mutex_lock(&pc8736x_gpio_config_lock);
 
        device_select(SIO_GPIO_UNIT);
        select_pin(index);
@@ -133,7 +133,7 @@ static inline u32 pc8736x_gpio_configure_fn(unsigned index, u32 mask, u32 bits,
        new_config = (config & mask) | bits;
        superio_outb(func_slct, new_config);
 
-       spin_unlock_irqrestore(&pc8736x_gpio_config_lock, flags);
+       mutex_unlock(&pc8736x_gpio_config_lock);
 
        return config;
 }