On 2020/10/23 下午6:40, Zhu Lingshan wrote:
LKP considered variable 'ret' in vhost_vdpa_setup_vq_irq() as
a unused variable, so suggest we remove it. Actually it stores
return value of irq_bypass_register_producer(), but we did not
check it, we should handle the failure case.
This commit will print a message if irq bypass register producer
fail, in this case, vqs still remain functional.
Signed-off-by: Zhu Lingshan <lingshan....@intel.com>
Reported-by: kernel test robot <l...@intel.com>
---
drivers/vhost/vdpa.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 62a9bb0efc55..d6b2c3bd1b01 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -107,6 +107,9 @@ static void vhost_vdpa_setup_vq_irq(struct vhost_vdpa *v,
u16 qid)
vq->call_ctx.producer.token = vq->call_ctx.ctx;
vq->call_ctx.producer.irq = irq;
ret = irq_bypass_register_producer(&vq->call_ctx.producer);
+ if (unlikely(ret))
+ dev_info(&v->dev, "vq %u, irq bypass producer (token %p)
registration fails, ret = %d\n",
+ qid, vq->call_ctx.producer.token, ret);
spin_unlock(&vq->call_ctx.ctx_lock);
}
Acked-by: Jason Wang <jasow...@redhat.com>
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