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Subject[PATCH 4.0 085/105] virtio_pci: Clear stale cpumask when setting irq affinity
Date
4.0-stable review patch.  If anyone has any objections, please let me know.

------------------

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/virtio/virtio_pci_common.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -423,6 +423,7 @@ int vp_set_vq_affinity(struct virtqueue
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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