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vhost_vdpa: don't setup irq offloading when irq_num < 0

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[ Upstream commit cce0ab2b2a ]

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 <lingshan.zhu@intel.com>
Link: https://lore.kernel.org/r/20220222115428.998334-3-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhu Lingshan
2022-02-22 19:54:25 +08:00
committed by Greg Kroah-Hartman
parent f0931ee125
commit 5a4cbcb3df
1 changed files with 4 additions and 1 deletions
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drivers/vhost/vdpa.c
+4 -1
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@@ -97,8 +97,11 @@ static void vhost_vdpa_setup_vq_irq(struct vhost_vdpa *v, u16 qid)
return; return;
irq = ops->get_vq_irq(vdpa, qid); irq = ops->get_vq_irq(vdpa, qid);
if (irq < 0)
return;
irq_bypass_unregister_producer(&vq->call_ctx.producer); irq_bypass_unregister_producer(&vq->call_ctx.producer);
if (!vq->call_ctx.ctx || irq < 0) if (!vq->call_ctx.ctx)
return; return;
vq->call_ctx.producer.token = vq->call_ctx.ctx; vq->call_ctx.producer.token = vq->call_ctx.ctx;