diff options
| author | Zhu Lingshan <lingshan.zhu@intel.com> | 2022-02-22 14:54:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-25 10:17:53 +0300 |
| commit | 5a4cbcb3df45be164bdf9257ea7e0dd89e447cf3 (patch) | |
| tree | 47e75f4a2e67945e46995364057056efa83ad348 /drivers/vhost | |
| parent | f0931ee125ffc4e8be8ef27c36ca5811cff2a80b (diff) | |
| download | linux-5a4cbcb3df45be164bdf9257ea7e0dd89e447cf3.tar.xz | |
vhost_vdpa: don't setup irq offloading when irq_num < 0
[ 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>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vdpa.c | 5 |
1 files changed, 4 insertions, 1 deletions
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; |