[PATCH V4 3/4] vhost_vdpa: don't setup irq offloading when irq_num < 0
STALE1689d
From: Zhu Lingshan <hidden>
Date: 2022-02-03 07:35:09
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez
Revision v4 of 4 in this series.
Revisions (4)
- v2 [diff vs current]
- v3 [diff vs current]
- v4 current
- v5 [diff vs current]
When irq number is negative(e.g., -EINVAL), the virtqueue may be disabled or the virtqueues are sharing a device irq. In such case, we should not setup irq offloading for a virtqueue. Signed-off-by: Zhu Lingshan <redacted> --- drivers/vhost/vdpa.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 851539807bc9..c4fcacb0de3a 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c@@ -96,6 +96,10 @@ static void vhost_vdpa_setup_vq_irq(struct vhost_vdpa *v, u16 qid) if (!ops->get_vq_irq) return; + irq = ops->get_vq_irq(vdpa, qid); + if (irq < 0) + return; + irq = ops->get_vq_irq(vdpa, qid); irq_bypass_unregister_producer(&vq->call_ctx.producer); if (!vq->call_ctx.ctx || irq < 0)
--
2.27.0