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Date: Wed, 6 Apr 2022 21:14:03 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Zhu Lingshan <lingshan.zhu@...el.com>,
"Michael S . Tsirkin" <mst@...hat.com>,
Sasha Levin <sashal@...nel.org>, jasowang@...hat.com,
kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.10 15/25] vhost_vdpa: don't setup irq offloading when irq_num < 0
From: Zhu Lingshan <lingshan.zhu@...el.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@...el.com>
Link: https://lore.kernel.org/r/20220222115428.998334-3-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.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;
--
2.35.1
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