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authorThadeu Lima de Souza Cascardo <cascardo@canonical.com>2019-09-03 14:18:02 -0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-10-05 12:27:53 +0200
commitc22df8ea7c5831d6fdca2f6f136f0d32d7064ff9 (patch)
tree0bd7639f28c4bc5484f91ee8c1c3f8e9ef760d82 /kernel/time/alarmtimer.c
parent8b49a407ce256d147861562e19f71a759e97b140 (diff)
alarmtimer: Use EOPNOTSUPP instead of ENOTSUPP
commit f18ddc13af981ce3c7b7f26925f099e7c6929aba upstream. 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 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/time/alarmtimer.c')
-rw-r--r--kernel/time/alarmtimer.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index e78480b81f8d..70aef327b6e8 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -530,7 +530,7 @@ static int alarm_timer_create(struct k_itimer *new_timer)
struct alarm_base *base;
if (!alarmtimer_get_rtcdev())
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
if (!capable(CAP_WAKE_ALARM))
return -EPERM;
@@ -759,7 +759,7 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags,
struct restart_block *restart;
if (!alarmtimer_get_rtcdev())
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
if (flags & ~TIMER_ABSTIME)
return -EINVAL;