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authorThomas Gleixner <tglx@linutronix.de>2014-03-04 20:43:40 +0000
committerThomas Gleixner <tglx@linutronix.de>2014-03-12 13:07:41 +0100
commit1ed71e59bca79e866c4bebbe1efc0bc18245119d (patch)
tree5645f7d1f9ae2687ec155818b9bbf3d3f15b80be /arch/parisc
parent753fbd23f5e59ea9dc0cabe0a684d32100a4af02 (diff)
parisc: 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: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: linux-parisc@vger.kernel.org Link: http://lkml.kernel.org/r/20140304203100.859489993@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/kernel/irq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 8ceac478560..cfe056fe7f5 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -117,7 +117,7 @@ int cpu_check_affinity(struct irq_data *d, const struct cpumask *dest)
return -EINVAL;
/* whatever mask they set, we just allow one CPU */
- cpu_dest = first_cpu(*dest);
+ cpu_dest = cpumask_first_and(dest, cpu_online_mask);
return cpu_dest;
}