rtc-dev: return -ENOTTY in ioctl if irq_set_freq is not implemented by driver
Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: David Brownell <david-b@pacbell.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -341,6 +341,8 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
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case RTC_IRQP_READ:
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if (ops->irq_set_freq)
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err = put_user(rtc->irq_freq, (unsigned long __user *)uarg);
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else
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err = -ENOTTY;
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break;
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case RTC_IRQP_SET:
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