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vDPA: dont change vq irq after DRIVER_OK

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IRQ of a vq is not expected to be changed in a DRIVER_OK ~ !DRIVER_OK
period for irq offloading purposes. Place this comment at the side of
bus ops get_vq_irq than in set_status in vhost_vdpa.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Link: https://lore.kernel.org/r/20200804102123.69978-1-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan 2020-08-04 18:21:23 +08:00 committed by Michael S. Tsirkin
parent 46af9adefd
commit 4c05433bc6
2 changed files with 1 additions and 1 deletions
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1
drivers/vhost/vdpa.c
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@ -172,7 +172,6 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
ops->set_status(vdpa, status);
/* vq irq is not expected to be changed once DRIVER_OK is set */
if ((status & VIRTIO_CONFIG_S_DRIVER_OK) && !(status_old & VIRTIO_CONFIG_S_DRIVER_OK))
for (i = 0; i < nvqs; i++)
vhost_vdpa_setup_vq_irq(v, i);

1
include/linux/vdpa.h
View File

@ -186,6 +186,7 @@ struct vdpa_config_ops {
u64 (*get_vq_state)(struct vdpa_device *vdev, u16 idx);
struct vdpa_notification_area
(*get_vq_notification)(struct vdpa_device *vdev, u16 idx);
/* vq irq is not expected to be changed once DRIVER_OK is set */
int (*get_vq_irq)(struct vdpa_device *vdv, u16 idx);
/* Device ops */