tree ee642b2934ba01c1e5ee4f367bde2340abdef4b7
parent 3b47fd5ca9ead91156bcdf6435279ad0b14a650c
author Thadeu Lima de Souza Cascardo <cascardo@canonical.com> 1567531082 -0300
committer Thomas Gleixner <tglx@linutronix.de> 1567711166 +0200

alarmtimer: Use EOPNOTSUPP instead of ENOTSUPP

ENOTSUPP is not supposed to be returned to userspace. This was found on an
OpenPower machine, where the RTC does not support set_alarm.

On that system, a clock_nanosleep(CLOCK_REALTIME_ALARM, ...) results in
"524 Unknown error 524"

Replace it with EOPNOTSUPP which results in the expected "95 Operation not
supported" error.

Fixes: 1c6b39ad3f01 (alarmtimers: Return -ENOTSUPP if no RTC device is present)
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20190903171802.28314-1-cascardo@canonical.com