From: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Date: Tue, 9 Apr 2024 18:04:56 +0000 (+0200)
Subject: fs: fat: convert change month correctly
X-Git-Url: http://git.dujemihanovic.xyz/html/index.html?a=commitdiff_plain;h=3c1bc9f15c18149a26fbd7f604f76f949a29bc7d;p=u-boot.git

fs: fat: convert change month correctly

The month is stored in 5 - 8. We need to shift it by 5 bits.

Cf. Microsoft FAT Specification, 2005-08-30

Fixes: 13c11c665320 ("fs: fat: add file attributes to struct fs_dirent")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Alexander Dahl <ada@thorsis.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
---

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 14e53cf2d5..2dd9d4e72d 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -1254,7 +1254,7 @@ out:
 static void __maybe_unused fat2rtc(u16 date, u16 time, struct rtc_time *tm)
 {
 	tm->tm_mday = date & 0x1f;
-	tm->tm_mon = (date & 0x1e0) >> 4;
+	tm->tm_mon = (date & 0x1e0) >> 5;
 	tm->tm_year = (date >> 9) + 1980;
 
 	tm->tm_sec = (time & 0x1f) << 1;