diff options
| author | Enrico Scholz <enrico.scholz@sigma-chemnitz.de> | 2015-11-27 15:02:55 +0300 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2016-01-11 22:19:57 +0300 |
| commit | 2ad2c17480b6208a35a4ffb937effe0ba1ed39de (patch) | |
| tree | e109844dc37c39388e02ed452609994ab3b50889 /drivers/rtc | |
| parent | 4d833d601332b00a1ef5f0249e97481d02f3ad02 (diff) | |
| download | linux-2ad2c17480b6208a35a4ffb937effe0ba1ed39de.tar.xz | |
rtc: da9063: avoid writing undefined data to rtc
driver did
| static void da9063_tm_to_data(struct rtc_time *tm, u8 *data,
| {
| const struct da9063_compatible_rtc_regmap *config = rtc->config;
|
| data[RTC_SEC] &= ~config->rtc_count_sec_mask;
| data[RTC_SEC] |= tm->tm_sec & config->rtc_count_sec_mask;
| ...
| }
| ...
| static int da9063_rtc_set_time(struct device *dev, struct rtc_time *tm)
| {
| ...
| u8 data[RTC_DATA_LEN];
| int ret;
|
| da9063_tm_to_data(tm, data, rtc);
which means that some bits of stack content (in 'data[]') was masked out
and written to the RTC.
Because da9063_tm_to_data() is used only by da9063_rtc_set_time() and
da9063_rtc_set_alarm(), we can write fields directly.
Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Acked-by: Steve Twiss <stwiss.opensource@diasemi.com>
Tested-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-da9063.c | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/drivers/rtc/rtc-da9063.c b/drivers/rtc/rtc-da9063.c index d6c853bbfa9f..f85cae240f12 100644 --- a/drivers/rtc/rtc-da9063.c +++ b/drivers/rtc/rtc-da9063.c @@ -191,24 +191,13 @@ static void da9063_tm_to_data(struct rtc_time *tm, u8 *data, { const struct da9063_compatible_rtc_regmap *config = rtc->config; - data[RTC_SEC] &= ~config->rtc_count_sec_mask; - data[RTC_SEC] |= tm->tm_sec & config->rtc_count_sec_mask; - - data[RTC_MIN] &= ~config->rtc_count_min_mask; - data[RTC_MIN] |= tm->tm_min & config->rtc_count_min_mask; - - data[RTC_HOUR] &= ~config->rtc_count_hour_mask; - data[RTC_HOUR] |= tm->tm_hour & config->rtc_count_hour_mask; - - data[RTC_DAY] &= ~config->rtc_count_day_mask; - data[RTC_DAY] |= tm->tm_mday & config->rtc_count_day_mask; - - data[RTC_MONTH] &= ~config->rtc_count_month_mask; - data[RTC_MONTH] |= MONTHS_TO_DA9063(tm->tm_mon) & + data[RTC_SEC] = tm->tm_sec & config->rtc_count_sec_mask; + data[RTC_MIN] = tm->tm_min & config->rtc_count_min_mask; + data[RTC_HOUR] = tm->tm_hour & config->rtc_count_hour_mask; + data[RTC_DAY] = tm->tm_mday & config->rtc_count_day_mask; + data[RTC_MONTH] = MONTHS_TO_DA9063(tm->tm_mon) & config->rtc_count_month_mask; - - data[RTC_YEAR] &= ~config->rtc_count_year_mask; - data[RTC_YEAR] |= YEARS_TO_DA9063(tm->tm_year) & + data[RTC_YEAR] = YEARS_TO_DA9063(tm->tm_year) & config->rtc_count_year_mask; } |