On Tue, Feb 19, 2013 at 03:27:41PM +0100, Lars Poeschel wrote:
> +static int pwmchip_export(struct pwm_chip *chip)
> +{
> + int status;
> + struct device *dev;
> +
> + mutex_lock(&sysfs_lock);
> + dev = device_create(&pwm_class, chip->dev, MKDEV(0, 0), chip,
> + "pwmchip%d", chip->base);
> + if (!IS_ERR(dev))
> + status = sysfs_create_group(&dev->kobj, &pwmchip_attr_group);
> + else
> + status = PTR_ERR(dev);
You can't create sysfs files after the device has been exposed to
userspace. Please use the default group functionality for the class,
which fixes this problem.
thanks,
greg k-h
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