diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2014-03-05 00:43:39 +0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-03-12 16:07:40 +0400 |
| commit | 421d1563c6620423d23e394711e3f209e585c161 (patch) | |
| tree | d457d6ee0fc69b8e1898392dece144f0589a3bc0 /arch/mips/sibyte/bcm1480 | |
| parent | 785aebd0cfff52e735ad4fd188d3726b5affc8e5 (diff) | |
| download | linux-421d1563c6620423d23e394711e3f209e585c161.tar.xz | |
mips: Validate online cpus in irq_set_affinity() callbacks
The [user space] interface does not filter out offline cpus. It merily
guarantees that the mask contains at least one online cpu.
So the selector in the irq chip implementation needs to make sure to
pick only an online cpu because otherwise:
Offline Core 1
Set affinity to 0xe (is valid due to online mask 0xd)
cpumask_first will pick core 1, which is offline
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/20140304203100.744800502@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/mips/sibyte/bcm1480')
| -rw-r--r-- | arch/mips/sibyte/bcm1480/irq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c index 09d6e16a70f1..59cfe2659771 100644 --- a/arch/mips/sibyte/bcm1480/irq.c +++ b/arch/mips/sibyte/bcm1480/irq.c @@ -95,7 +95,7 @@ static int bcm1480_set_affinity(struct irq_data *d, const struct cpumask *mask, u64 cur_ints; unsigned long flags; - i = cpumask_first(mask); + i = cpumask_first_and(mask, cpu_online_mask); /* Convert logical CPU to physical CPU */ cpu = cpu_logical_map(i); |