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| author | Xunlei Pang <pang.xunlei@linaro.org> | 2015-06-12 10:04:12 +0800 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2015-06-25 01:13:42 +0200 |
| commit | 9033fd8ba7e96821e65fe3afc3f4077a8b66d1c9 (patch) | |
| tree | ae0657008e5171227c211bf488f818ba92d161f7 /drivers/rtc/rtc-sunxi.c | |
| parent | f118db1efdbd224b3e0dd174a8942471eee798a0 (diff) | |
| download | linux-9033fd8ba7e96821e65fe3afc3f4077a8b66d1c9.tar.gz linux-9033fd8ba7e96821e65fe3afc3f4077a8b66d1c9.tar.bz2 linux-9033fd8ba7e96821e65fe3afc3f4077a8b66d1c9.zip | |
rtc: sunxi: Replace deprecated rtc_tm_to_time()
sunxi_rtc_setalarm() uses deprecated rtc_tm_to_time(),
which will overflow in year 2106 on 32-bit machines.
This patch solves this by:
- Replacing rtc_tm_to_time() with rtc_tm_sub()
Also remove the unnecessary initial zeroing of some
local variables in sunxi_rtc_setalarm().
Cc: Carlo Caione <carlo.caione@gmail.com>
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc/rtc-sunxi.c')
| -rw-r--r-- | drivers/rtc/rtc-sunxi.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/drivers/rtc/rtc-sunxi.c b/drivers/rtc/rtc-sunxi.c index 6e678fa4dfaf..52543ae37c98 100644 --- a/drivers/rtc/rtc-sunxi.c +++ b/drivers/rtc/rtc-sunxi.c @@ -269,14 +269,13 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm) struct sunxi_rtc_dev *chip = dev_get_drvdata(dev); struct rtc_time *alrm_tm = &wkalrm->time; struct rtc_time tm_now; - u32 alrm = 0; - unsigned long time_now = 0; - unsigned long time_set = 0; - unsigned long time_gap = 0; - unsigned long time_gap_day = 0; - unsigned long time_gap_hour = 0; - unsigned long time_gap_min = 0; - int ret = 0; + u32 alrm; + time64_t diff; + unsigned long time_gap; + unsigned long time_gap_day; + unsigned long time_gap_hour; + unsigned long time_gap_min; + int ret; ret = sunxi_rtc_gettime(dev, &tm_now); if (ret < 0) { @@ -284,14 +283,18 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm) return -EINVAL; } - rtc_tm_to_time(alrm_tm, &time_set); - rtc_tm_to_time(&tm_now, &time_now); - if (time_set <= time_now) { + diff = rtc_tm_sub(alrm_tm, &tm_now); + if (diff <= 0) { dev_err(dev, "Date to set in the past\n"); return -EINVAL; } - time_gap = time_set - time_now; + if (diff > 255 * SEC_IN_DAY) { + dev_err(dev, "Day must be in the range 0 - 255\n"); + return -EINVAL; + } + + time_gap = diff; time_gap_day = time_gap / SEC_IN_DAY; time_gap -= time_gap_day * SEC_IN_DAY; time_gap_hour = time_gap / SEC_IN_HOUR; @@ -299,11 +302,6 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm) time_gap_min = time_gap / SEC_IN_MIN; time_gap -= time_gap_min * SEC_IN_MIN; - if (time_gap_day > 255) { - dev_err(dev, "Day must be in the range 0 - 255\n"); - return -EINVAL; - } - sunxi_rtc_setaie(0, chip); writel(0, chip->base + SUNXI_ALRM_DHMS); usleep_range(100, 300); |