@@ -32,6 +32,7 @@
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
+#include <linux/mutex.h>
#include "cbus.h"
#include "tahvo.h"
@@ -43,7 +44,7 @@ static int tahvo_initialized;
static int tahvo_is_betty;
static struct tasklet_struct tahvo_tasklet;
-static DEFINE_SPINLOCK(tahvo_lock);
+static struct mutex tahvo_lock;
static struct device *the_dev;
@@ -97,15 +98,14 @@ EXPORT_SYMBOL(tahvo_write_reg);
*/
void tahvo_set_clear_reg_bits(unsigned reg, u16 set, u16 clear)
{
- unsigned long flags;
u16 w;
- spin_lock_irqsave(&tahvo_lock, flags);
+ mutex_lock(&tahvo_lock);
w = tahvo_read_reg(reg);
w &= ~clear;
w |= set;
tahvo_write_reg(reg, w);
- spin_unlock_irqrestore(&tahvo_lock, flags);
+ mutex_unlock(&tahvo_lock);
}
/*
@@ -113,14 +113,13 @@ void tahvo_set_clear_reg_bits(unsigned reg, u16 set, u16 clear)
*/
void tahvo_disable_irq(int id)
{
- unsigned long flags;
u16 mask;
- spin_lock_irqsave(&tahvo_lock, flags);
+ mutex_lock(&tahvo_lock);
mask = tahvo_read_reg(TAHVO_REG_IMR);
mask |= 1 << id;
tahvo_write_reg(TAHVO_REG_IMR, mask);
- spin_unlock_irqrestore(&tahvo_lock, flags);
+ mutex_unlock(&tahvo_lock);
}
EXPORT_SYMBOL(tahvo_disable_irq);
@@ -129,14 +128,13 @@ EXPORT_SYMBOL(tahvo_disable_irq);
*/
void tahvo_enable_irq(int id)
{
- unsigned long flags;
u16 mask;
- spin_lock_irqsave(&tahvo_lock, flags);
+ mutex_lock(&tahvo_lock);
mask = tahvo_read_reg(TAHVO_REG_IMR);
mask &= ~(1 << id);
tahvo_write_reg(TAHVO_REG_IMR, mask);
- spin_unlock_irqrestore(&tahvo_lock, flags);
+ mutex_unlock(&tahvo_lock);
}
EXPORT_SYMBOL(tahvo_enable_irq);
@@ -297,6 +295,7 @@ static int __init tahvo_probe(struct platform_device *pdev)
int rev, id, ret;
int irq;
+ mutex_init(&tahvo_lock);
the_dev = &pdev->dev;
/* Prepare tasklet */
GPIO operations can sleep, so move to a mutex. Signed-off-by: Felipe Balbi <balbi@ti.com> --- drivers/cbus/tahvo.c | 19 +++++++++---------- 1 files changed, 9 insertions(+), 10 deletions(-)