[3.16.y-ckt stable] Patch "virtio_pci: Clear stale cpumask when setting irq affinity" has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Mon Jun 22 15:15:17 UTC 2015
This is a note to let you know that I have just added a patch titled
virtio_pci: Clear stale cpumask when setting irq affinity
to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue
This patch is scheduled to be released in version 3.16.7-ckt14.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From 0256da1366d978a1c8d1bbd1155e74c5b75bbc2a Mon Sep 17 00:00:00 2001
From: Jiang Liu <jiang.liu at linux.intel.com>
Date: Thu, 4 Jun 2015 16:41:44 +0800
Subject: virtio_pci: Clear stale cpumask when setting irq affinity
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 at linux.intel.com>
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
[ luis: backported to 3.16:
- file rename: virtio_pci_common.c -> virtio_pci.c ]
Signed-off-by: Luis Henriques <luis.henriques at 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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