[PATCH] vDPA: dont change vq irq after DRIVER_OK
From: Zhu Lingshan <hidden>
Date: 2020-08-04 10:24:23
Also in:
kvm
Subsystem:
the rest, virtio core, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
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 <redacted> --- drivers/vhost/vdpa.c | 1 - include/linux/vdpa.h | 1 + 2 files changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 278ea2f00172..26f166a8192e 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c@@ -222,7 +222,6 @@ 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);
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index ba898486f2c7..03aa9f77f192 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h@@ -183,6 +183,7 @@ 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 */
--
2.18.4