From d95cbe6158a679d50e03787bb1dc21ff73dac372 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Sun, 9 Mar 2008 20:42:27 +0000 Subject: leds: Fix potential leds-gpio oops MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Call gpio_cansleep only after gpio_request succeeded avoiding an oops. Signed-off-by: Uwe Kleine-König Acked-by: David Brownell Signed-off-by: Richard Purdie --- drivers/leds/leds-gpio.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index 6c0a9c4761e..d13b622419d 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -79,6 +79,10 @@ static int gpio_led_probe(struct platform_device *pdev) cur_led = &pdata->leds[i]; led_dat = &leds_data[i]; + ret = gpio_request(cur_led->gpio, cur_led->name); + if (ret < 0) + goto err; + led_dat->cdev.name = cur_led->name; led_dat->cdev.default_trigger = cur_led->default_trigger; led_dat->gpio = cur_led->gpio; @@ -87,10 +91,6 @@ static int gpio_led_probe(struct platform_device *pdev) led_dat->cdev.brightness_set = gpio_led_set; led_dat->cdev.brightness = LED_OFF; - ret = gpio_request(led_dat->gpio, led_dat->cdev.name); - if (ret < 0) - goto err; - gpio_direction_output(led_dat->gpio, led_dat->active_low); INIT_WORK(&led_dat->work, gpio_led_work); -- cgit v1.2.3 From 306dd85c1d41e20a07d1e821e27f5df4927bb5e7 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Thu, 27 Mar 2008 00:59:02 +0000 Subject: leds: Remove incorrect use of preempt_count() from leds-gpio It appears that we can't just check to see if we're in a task context ... so instead of trying that, just make the relevant leds always schedule a little worklet. Signed-off-by: David Brownell Signed-off-by: Richard Purdie --- drivers/leds/leds-gpio.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index d13b622419d..4c0b05852cb 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -49,13 +49,13 @@ static void gpio_led_set(struct led_classdev *led_cdev, if (led_dat->active_low) level = !level; - /* setting GPIOs with I2C/etc requires a preemptible task context */ + /* Setting GPIOs with I2C/etc requires a task context, and we don't + * seem to have a reliable way to know if we're already in one; so + * let's just assume the worst. + */ if (led_dat->can_sleep) { - if (preempt_count()) { - led_dat->new_level = level; - schedule_work(&led_dat->work); - } else - gpio_set_value_cansleep(led_dat->gpio, level); + led_dat->new_level = level; + schedule_work(&led_dat->work); } else gpio_set_value(led_dat->gpio, level); } -- cgit v1.2.3