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Subject[PATCH 1/3] viafb: Do not remove gpiochip under spinlock
Date
gpiochip_remove() is not meant to be called with interrupts disabled, and
there is no need for the lock here in any case.

Reported-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
drivers/video/via/via-gpio.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/video/via/via-gpio.c b/drivers/video/via/via-gpio.c
index 44537be..63cb7ac 100644
--- a/drivers/video/via/via-gpio.c
+++ b/drivers/video/via/via-gpio.c
@@ -246,7 +246,6 @@ static int viafb_gpio_remove(struct platform_device *platdev)
unsigned long flags;
int ret = 0, i;

- spin_lock_irqsave(&gpio_config.vdev->reg_lock, flags);
/*
* Get unregistered.
*/
@@ -254,16 +253,16 @@ static int viafb_gpio_remove(struct platform_device *platdev)
ret = gpiochip_remove(&gpio_config.gpio_chip);
if (ret) { /* Somebody still using it? */
printk(KERN_ERR "Viafb: GPIO remove failed\n");
- goto out;
+ return ret;
}
}
/*
* Disable the ports.
*/
+ spin_lock_irqsave(&gpio_config.vdev->reg_lock, flags);
for (i = 0; i < gpio_config.gpio_chip.ngpio; i += 2)
viafb_gpio_disable(gpio_config.active_gpios[i]);
gpio_config.gpio_chip.ngpio = 0;
-out:
spin_unlock_irqrestore(&gpio_config.vdev->reg_lock, flags);
return ret;
}
--
1.7.0.1
--
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