diff options
| author | Hyogi Gim <ciogenis@gmail.com> | 2014-12-10 15:52:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-10 17:41:13 -0800 |
| commit | 16682c86d2fb68cc78c6cc0af51c2a78809dc5b0 (patch) | |
| tree | 99297da840e40be5c9a98a1e3c1fb4ed038a1bad /drivers/rtc/interface.c | |
| parent | 0e95325525c4383565cea4f402f15a3113162d05 (diff) | |
| download | lwn-16682c86d2fb68cc78c6cc0af51c2a78809dc5b0.tar.gz lwn-16682c86d2fb68cc78c6cc0af51c2a78809dc5b0.zip | |
drivers/rtc/interface.c: check the validation of rtc_time in __rtc_read_time
Some rtc devices always return '0' when rtc_class_ops.read_time is
called. So if rtc_time isn't verified in callback, rtc interface cannot
know whether rtc_time is valid.
Check rtc_time by using 'rtc_valid_tm' in '__rtc_read_time'. And add
the message for debugging.
Signed-off-by: Hyogi Gim <hyogi.gim@lge.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: John Stultz <john.stultz@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/interface.c')
| -rw-r--r-- | drivers/rtc/interface.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 5b2717f5dafa..818ea97f403c 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -30,6 +30,14 @@ static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm) else { memset(tm, 0, sizeof(struct rtc_time)); err = rtc->ops->read_time(rtc->dev.parent, tm); + if (err < 0) { + dev_err(&rtc->dev, "read_time: fail to read\n"); + return err; + } + + err = rtc_valid_tm(tm); + if (err < 0) + dev_err(&rtc->dev, "read_time: rtc_time isn't valid\n"); } return err; } |