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author | Arve Hjønnevåg <arve@android.com> | 2011-11-22 18:24:51 -0800 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:55:51 -0800 |
commit | df9490f1a5f1019ebf36bd7820ff405ddc06bfa9 (patch) | |
tree | ce8c565e77f96dbf8bc196a21b1056d494b29c23 /kernel | |
parent | 0cbc008c56f7b4a11ba6fe80e196d7ab322baabf (diff) |
rtc: Fix some bugs that allowed accumulating time drift in suspend/resume
commit 6a8943d9ec2567572fca25cf69ad45844d0141a3 upstream.
The current code checks if abs(delta_delta.tv_sec) is greater or
equal to two before it discards the old delta value, but this can
trigger at close to -1 seconds since -1.000000001 seconds is stored
as tv_sec -2 and tv_nsec 999999999 in a normalized timespec.
rtc_resume had an early return check if the rtc value had not changed
since rtc_suspend. This effectivly stops time for the duration of the
short sleep. Check if sleep_time is positive after all the adjustments
have been applied instead since this allows the old_system adjustment
in rtc_suspend to have an effect even for short sleep cycles.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions