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virtio_pci: Clear stale cpumask when setting irq affinity

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The cpumask vp_dev->msix_affinity_masks[info->msix_vector] may contain
staled information when vp_set_vq_affinity() gets called, so clear it
before setting the new cpu bit mask.

Cc: stable@vger.kernel.org
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jiang Liu 2015-06-04 16:41:44 +08:00 committed by Michael S. Tsirkin
parent 8a7b19d8b5
commit 210d150e1f
1 changed files with 1 additions and 0 deletions
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drivers/virtio/virtio_pci_common.c
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@ -423,6 +423,7 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu)
if (cpu == -1)
irq_set_affinity_hint(irq, NULL);
else {
cpumask_clear(mask);
cpumask_set_cpu(cpu, mask);
irq_set_affinity_hint(irq, mask);
}