diff options
| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2013-10-14 17:33:16 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-04 10:50:14 -0800 |
| commit | 3e05092412210f3a298ef2a4e5f58857513e9954 (patch) | |
| tree | d9bb8d5c47986907e7ac939ef90cad5a32708c2b /kernel | |
| parent | 664eaaa26bca6272673eff01ba5468f95905039d (diff) | |
alarmtimer: return EINVAL instead of ENOTSUPP if rtcdev doesn't exist
commit 98d6f4dd84a134d942827584a3c5f67ffd8ec35f upstream.
Fedora Ruby maintainer reported latest Ruby doesn't work on Fedora Rawhide
on ARM. (http://bugs.ruby-lang.org/issues/9008)
Because of, commit 1c6b39ad3f (alarmtimers: Return -ENOTSUPP if no
RTC device is present) intruduced to return ENOTSUPP when
clock_get{time,res} can't find a RTC device. However this is incorrect.
First, ENOTSUPP isn't exported to userland (ENOTSUP or EOPNOTSUP are the
closest userland equivlents).
Second, Posix and Linux man pages agree that clock_gettime and
clock_getres should return EINVAL if clk_id argument is invalid.
While the arugment that the clockid is valid, but just not supported
on this hardware could be made, this is just a technicality that
doesn't help userspace applicaitons, and only complicates error
handling.
Thus, this patch changes the code to use EINVAL.
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Reported-by: Vit Ondruch <v.ondruch@tiscali.cz>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
[jstultz: Tweaks to commit message to include full rational]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/alarmtimer.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 8a538c55fc7b..877aa733b961 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -474,7 +474,7 @@ static int alarm_clock_getres(const clockid_t which_clock, struct timespec *tp) clockid_t baseid = alarm_bases[clock2alarm(which_clock)].base_clockid; if (!alarmtimer_get_rtcdev()) - return -ENOTSUPP; + return -EINVAL; return hrtimer_get_res(baseid, tp); } @@ -491,7 +491,7 @@ static int alarm_clock_get(clockid_t which_clock, struct timespec *tp) struct alarm_base *base = &alarm_bases[clock2alarm(which_clock)]; if (!alarmtimer_get_rtcdev()) - return -ENOTSUPP; + return -EINVAL; *tp = ktime_to_timespec(base->gettime()); return 0; |