| From | Luis Henriques <> | Subject | [PATCH 3.16.y-ckt 53/71] virtio_pci: Clear stale cpumask when setting irq affinity | Date | Thu, 25 Jun 2015 11:02:32 +0100 |
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3.16.7-ckt14 -stable review patch. If anyone has any objections, please let me know.
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From: Jiang Liu <jiang.liu@linux.intel.com>
commit 210d150e1f5da506875e376422ba31ead2d49621 upstream.
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.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> [ luis: backported to 3.16: - file rename: virtio_pci_common.c -> virtio_pci.c ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/virtio/virtio_pci.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index 52c4607fec9e..c09527df161c 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -645,6 +645,7 @@ static 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); }
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