From: Zhu Lingshan lingshan.zhu@intel.com
[ Upstream commit cce0ab2b2a39072d81f98017f7b076f3410ef740 ]
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 --- drivers/vhost/vdpa.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index e4d60009d908..04578aa87e4d 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -97,8 +97,11 @@ static void vhost_vdpa_setup_vq_irq(struct vhost_vdpa *v, u16 qid) return;
irq = ops->get_vq_irq(vdpa, qid); + if (irq < 0) + return; + irq_bypass_unregister_producer(&vq->call_ctx.producer); - if (!vq->call_ctx.ctx || irq < 0) + if (!vq->call_ctx.ctx) return;
vq->call_ctx.producer.token = vq->call_ctx.ctx;