diff options
| author | Thomas Pfaff <tpfaff@pcs.com> | 2013-10-11 12:42:49 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@rostedt.homelinux.com> | 2014-02-26 21:21:34 -0500 |
| commit | 3dba946359ddf5a6f7e60b50c060a2b64bacc7bd (patch) | |
| tree | ab76d8f7796da8128aaf585063aaa495fe15679a | |
| parent | ee6a0cd019ecf12e991399272c22096635024802 (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 a6bea1915855..30211a79525b 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -1024,7 +1024,7 @@ __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 |