linux-kernel - [PATCH 3.12 102/104] drivers/rtc/rtc-efi.c: avoid subtracting day twice when computing year days

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Message-Id: <44a3aa6b1f9ded206117d516d35e6ba1d5dc646f.1408535000.git.jslaby@suse.cz>
Date:	Wed, 20 Aug 2014 13:44:05 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	"Lee, Chun-Yi" <joeyli.kernel@...il.com>,
	"Lee, Chun-Yi" <jlee@...e.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 102/104] drivers/rtc/rtc-efi.c: avoid subtracting day twice when computing year days

From: "Lee, Chun-Yi" <joeyli.kernel@...il.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 809d9627087e1db63b8672c1f264af73b13116fb upstream.

Compared source code of rtc-lib.c::rtc_year_days() with
efirtc.c::rtc_year_days(), found the code in rtc-efi decreases value of
day twice when it computing year days.  rtc-lib.c::rtc_year_days() has
already decrease days and return the year days from 0 to 365.

Signed-off-by: Lee, Chun-Yi <jlee@...e.com>
Cc: Alessandro Zummo <a.zummo@...ertech.it>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/rtc/rtc-efi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 797aa0252ba9..c4c38431012e 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -35,7 +35,7 @@ static inline int
 compute_yday(efi_time_t *eft)
 {
 	/* efi_time_t.month is in the [1-12] so, we need -1 */
-	return rtc_year_days(eft->day - 1, eft->month - 1, eft->year);
+	return rtc_year_days(eft->day, eft->month - 1, eft->year);
 }
 /*
  * returns day of the week [0-6] 0=Sunday
-- 
2.0.4

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