From: Jiang Liu <jiang.liu@linux.intel.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Jiang Liu <jiang.liu@linux.intel.com>,
virtualization@lists.linux-foundation.org
Subject: [PATCH] virtio_pci: Clear stale cpumask when setting irq affinity
Date: Thu, 4 Jun 2015 16:41:44 +0800 [thread overview]
Message-ID: <1433407304-22981-1-git-send-email-jiang.liu@linux.intel.com> (raw)
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>
---
drivers/virtio/virtio_pci_common.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index e894eb278d83..eba1b7ac7294 100644
--- 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 *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);
}
--
1.7.10.4
next reply other threads:[~2015-06-04 8:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-04 8:41 Jiang Liu [this message]
2015-06-04 12:55 ` [PATCH] virtio_pci: Clear stale cpumask when setting irq affinity Michael S. Tsirkin
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