diff options
Diffstat (limited to 'target/linux/s3c24xx/patches/0206-From-3a32be40f78404d5f1185f0b3d6b5632381cb33f-Mon-Se.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches/0206-From-3a32be40f78404d5f1185f0b3d6b5632381cb33f-Mon-Se.patch | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0206-From-3a32be40f78404d5f1185f0b3d6b5632381cb33f-Mon-Se.patch b/target/linux/s3c24xx/patches/0206-From-3a32be40f78404d5f1185f0b3d6b5632381cb33f-Mon-Se.patch new file mode 100755 index 0000000000..dfb6078b54 --- /dev/null +++ b/target/linux/s3c24xx/patches/0206-From-3a32be40f78404d5f1185f0b3d6b5632381cb33f-Mon-Se.patch @@ -0,0 +1,73 @@ +From 8279b4e4862b148b10e7d4d2967ac92eaae0f129 Mon Sep 17 00:00:00 2001 +From: Holger Freyther <zecke@openmoko.org> +Date: Fri, 25 Jul 2008 23:06:18 +0100 +Subject: [PATCH] From 3a32be40f78404d5f1185f0b3d6b5632381cb33f Mon Sep 17 00:00:00 2001 + Subject: [PATCH] [neo1973 leds] Move from mutex to spinlock because we may not use mutexes + The led triggers may call set_brightness from atomic contexts. As + mutex_lock calls might_sleep and sleeping is not allowed in atomic contexts + we have to switch to spinlocks here. + +Signed-Off-By: Holger Freyther <zecke@openmoko.org> +--- + drivers/leds/leds-neo1973-gta02.c | 10 +++++----- + 1 files changed, 5 insertions(+), 5 deletions(-) + +diff --git a/drivers/leds/leds-neo1973-gta02.c b/drivers/leds/leds-neo1973-gta02.c +index 952ad69..8fe817b 100644 +--- a/drivers/leds/leds-neo1973-gta02.c ++++ b/drivers/leds/leds-neo1973-gta02.c +@@ -27,7 +27,7 @@ + + struct gta02_led_priv + { +- struct mutex mutex; ++ spinlock_t lock; + struct led_classdev cdev; + struct s3c2410_pwm pwm; + unsigned int gpio; +@@ -53,6 +53,7 @@ static inline struct gta02_led_bundle *to_bundle(struct led_classdev *led_cdev) + static void gta02led_set(struct led_classdev *led_cdev, + enum led_brightness value) + { ++ unsigned long flags; + struct gta02_led_priv *lp = to_priv(led_cdev); + + /* +@@ -60,7 +61,7 @@ static void gta02led_set(struct led_classdev *led_cdev, + * value == 128 -> 50% duty cycle (medium power) + * value == 0 -> 0% duty cycle (zero power) + */ +- mutex_lock(&lp->mutex); ++ spin_lock_irqsave(&lp->lock, flags); + + if (lp->has_pwm) { + s3c2410_pwm_duty_cycle(value, &lp->pwm); +@@ -68,7 +69,7 @@ static void gta02led_set(struct led_classdev *led_cdev, + neo1973_gpb_setpin(lp->gpio, value ? 1 : 0); + } + +- mutex_unlock(&lp->mutex); ++ spin_unlock_irqrestore(&lp->lock, flags); + } + + #ifdef CONFIG_PM +@@ -170,7 +171,7 @@ static int __init gta02led_probe(struct platform_device *pdev) + break; + } + +- mutex_init(&lp->mutex); ++ spin_lock_init(&lp->lock); + rc = led_classdev_register(&pdev->dev, &lp->cdev); + } + +@@ -192,7 +193,6 @@ static int gta02led_remove(struct platform_device *pdev) + gta02led_set(&lp->cdev, 0); + + led_classdev_unregister(&lp->cdev); +- mutex_destroy(&lp->mutex); + } + + platform_set_drvdata(pdev, NULL); +-- +1.5.6.3 + |