This patch set uie_unsupported flag when driver probed because current rtc-efi
driver doesn't support UIE mode. Otherwise RTC_UIE_ON ioctl doesn't return 
EINVAL
and it causes userspace think the RTC_UIE supported by rtc-efi.

Set uie_unsupported then We can enable CONFIG_RTC_INTF_DEV_UIE_EMUL to emulate
RTC_UIE on rtc-efi.

Cc: Matt Fleming <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jan Beulich <[email protected]>
Signed-off-by: Lee, Chun-Yi <[email protected]>
---
 drivers/rtc/rtc-efi.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 4e74ec0..dad1687 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -208,6 +208,8 @@ static int __init efi_rtc_probe(struct platform_device *dev)
        if (IS_ERR(rtc))
                return PTR_ERR(rtc);
 
+       rtc->uie_unsupported = 1;
+
        platform_set_drvdata(dev, rtc);
 
        return 0;
-- 
1.6.4.2

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