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| author | Thomas Gleixner <tglx@linutronix.de> | 2014-03-04 20:43:38 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-03-12 13:07:40 +0100 |
| commit | 785aebd0cfff52e735ad4fd188d3726b5affc8e5 (patch) | |
| tree | 6bfc619f12e141f303fed584d8a29f23cc2d63be /arch/ia64/sn/kernel/msi_sn.c | |
| parent | 8783dd3a37a5853689e1a8fa728827a50905b912 (diff) | |
| download | op-kernel-dev-785aebd0cfff52e735ad4fd188d3726b5affc8e5.zip op-kernel-dev-785aebd0cfff52e735ad4fd188d3726b5affc8e5.tar.gz | |
ia64: 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: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: ia64 <linux-ia64@vger.kernel.org>
Link: http://lkml.kernel.org/r/20140304203100.650414633@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/ia64/sn/kernel/msi_sn.c')
| -rw-r--r-- | arch/ia64/sn/kernel/msi_sn.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c index 2b98b9e..afc58d2 100644 --- a/arch/ia64/sn/kernel/msi_sn.c +++ b/arch/ia64/sn/kernel/msi_sn.c @@ -166,7 +166,7 @@ static int sn_set_msi_irq_affinity(struct irq_data *data, struct sn_pcibus_provider *provider; unsigned int cpu, irq = data->irq; - cpu = cpumask_first(cpu_mask); + cpu = cpumask_first_and(cpu_mask, cpu_online_mask); sn_irq_info = sn_msi_info[irq].sn_irq_info; if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0) return -1; |
