diff options
| author | Thomas Pfaff <tpfaff@pcs.com> | 2013-10-11 12:42:49 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-11-20 23:15:01 -0500 |
| commit | 17f7554b3d45f88e2c35f55873a54aeecbe28ee0 (patch) | |
| tree | ded8ccee1659aeb6e9b7b719ca481e7395379916 | |
| parent | 8f50d792dcaf70f762c271a9722a83704abf3e0f (diff) | |
genirq: Set the irq thread policy without checking CAP_SYS_NICE
In commit ee23871389 ("genirq: Set irq thread to RT priority on
creation") we moved the assigment of the thread's priority from the
thread's function into __setup_irq(). That function may run in user
context for instance if the user opens an UART node and then driver
calls requests in the ->open() callback. That user may not have
CAP_SYS_NICE and so the irq thread won't run with the SCHED_OTHER
policy.
This patch uses sched_setscheduler_nocheck() so we omit the CAP_SYS_NICE
check which is otherwise required for the SCHED_OTHER policy.
Cc: Ivo Sieben <meltedpianoman@gmail.com>
Cc: stable@vger.kernel.org
Cc: stable-rt@vger.kernel.org
Signed-off-by: Thomas Pfaff <tpfaff@pcs.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
[bigeasy: rewrite the changelog]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
| -rw-r--r-- | kernel/irq/manage.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 88a4ff50f31b..5b51ba7ded53 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -1041,7 +1041,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) goto out_mput; } - sched_setscheduler(t, SCHED_FIFO, ¶m); + sched_setscheduler_nocheck(t, SCHED_FIFO, ¶m); /* * We keep the reference to the task struct even if |