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virtio: last-minute fix for 4.1 

This fixes a minor issue affecting multiqueue virtio net
 when user keeps changing the number of active queues
 and CPUs are added and removed by hotplug.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull last-minute virtio fix from Michael Tsirkin:
 "This fixes a minor issue affecting multiqueue virtio net when user
  keeps changing the number of active queues and CPUs are added and
  removed by hotplug"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_pci: Clear stale cpumask when setting irq affinity
This commit is contained in:
Linus Torvalds 2015-06-08 16:26:53 -07:00
parent 40b985fbe9 210d150e1f
commit 056537c686
1 changed files with 1 additions and 0 deletions
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1
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);
}