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| author | Chris Elston <celston@katalix.com> | 2008-12-23 13:57:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-23 15:58:21 -0800 |
| commit | cc6c2ca30074a0274c05dd3212c741a550f0d3c2 (patch) | |
| tree | e5a19743440bb1e52d07d3d466322232908142a5 /drivers/rtc | |
| parent | c47a75a45fa3a9d98b61f7e31983ffab2c44404f (diff) | |
| download | linux-cc6c2ca30074a0274c05dd3212c741a550f0d3c2.tar.gz linux-cc6c2ca30074a0274c05dd3212c741a550f0d3c2.tar.bz2 linux-cc6c2ca30074a0274c05dd3212c741a550f0d3c2.zip | |
rtc: rtc-isl1208: reject invalid dates
This patch for the rtc-isl1208 driver makes it reject invalid dates.
Signed-off-by: Chris Elston <celston@katalix.com>
[a.zummo@towertech.it: added comment explaining the check]
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: Hebert Valerio Riedel <hvr@gnu.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-isl1208.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c index 2cd77ab8fc66..054e05294af8 100644 --- a/drivers/rtc/rtc-isl1208.c +++ b/drivers/rtc/rtc-isl1208.c @@ -328,6 +328,13 @@ isl1208_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm) int sr; u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, }; + /* The clock has an 8 bit wide bcd-coded register (they never learn) + * for the year. tm_year is an offset from 1900 and we are interested + * in the 2000-2099 range, so any value less than 100 is invalid. + */ + if (tm->tm_year < 100) + return -EINVAL; + regs[ISL1208_REG_SC] = bin2bcd(tm->tm_sec); regs[ISL1208_REG_MN] = bin2bcd(tm->tm_min); regs[ISL1208_REG_HR] = bin2bcd(tm->tm_hour) | ISL1208_REG_HR_MIL; |