rtc-dev: return -ENOTTY in ioctl if irq_set_freq is not implemented by driver

Signed-off-by: Hans-Christian Egtvedt <[email protected]>
Cc: Haavard Skinnemoen <[email protected]>
Cc: David Brownell <[email protected]>
Cc: Alessandro Zummo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index f4e5f0040ff7a43263a2af50b9eb694624f3fa91..304535942de2568e120d26df0db9fe7c77289d5c 100644 (file)
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -341,6 +341,8 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
        case RTC_IRQP_READ:
                if (ops->irq_set_freq)
                        err = put_user(rtc->irq_freq, (unsigned long __user *)uarg);
+               else
+                       err = -ENOTTY;
                break;
 
        case RTC_IRQP_SET: