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| Started by | Luis Henriques <luis.henriques@canonical.com> |
|---|---|
| First post | 2015-06-25 12:10 +0200 |
| Last post | 2015-06-25 12:10 +0200 |
| Articles | 1 — 1 participant |
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[PATCH 3.16.y-ckt 53/71] virtio_pci: Clear stale cpumask when setting irq affinity Luis Henriques <luis.henriques@canonical.com> - 2015-06-25 12:10 +0200
| From | Luis Henriques <luis.henriques@canonical.com> |
|---|---|
| Date | 2015-06-25 12:10 +0200 |
| Subject | [PATCH 3.16.y-ckt 53/71] virtio_pci: Clear stale cpumask when setting irq affinity |
| Message-ID | <pFcgx-5Bx-5@gated-at.bofh.it> |
3.16.7-ckt14 -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>
[ 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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