linux-kernel - [PATCH 3/3] rtc-efi: set uie_unsupported for indicate rtc-efi doesn't support UIE mode

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Date:	Sat, 29 Dec 2012 00:26:41 +0800
From:	"Lee, Chun-Yi" <joeyli.kernel@...il.com>
To:	matt.fleming@...el.com
Cc:	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	"Lee, Chun-Yi" <jlee@...e.com>, "H. Peter Anvin" <hpa@...or.com>,
	Matthew Garrett <matthew.garrett@...ula.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Jan Beulich <JBeulich@...e.com>
Subject: [PATCH 3/3] rtc-efi: set uie_unsupported for indicate rtc-efi doesn't support UIE mode

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 <matt.fleming@...el.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Matthew Garrett <matthew.garrett@...ula.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Jan Beulich <JBeulich@...e.com>
Signed-off-by: Lee, Chun-Yi <jlee@...e.com>
---
 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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