[PATCH v3 04/21] vhost-vdpa: Use iommu_paging_domain_alloc()

[Lu Baolu <baolu.lu@linux.intel.com>]

Replace iommu_domain_alloc() with iommu_paging_domain_alloc().

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/vhost/vdpa.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 63a53680a85c..e31ec9ebc4ce 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -1312,26 +1312,24 @@ static int vhost_vdpa_alloc_domain(struct vhost_vdpa *v)
 	struct vdpa_device *vdpa = v->vdpa;
 	const struct vdpa_config_ops *ops = vdpa->config;
 	struct device *dma_dev = vdpa_get_dma_dev(vdpa);
-	const struct bus_type *bus;
 	int ret;
 
 	/* Device want to do DMA by itself */
 	if (ops->set_map || ops->dma_map)
 		return 0;
 
-	bus = dma_dev->bus;
-	if (!bus)
-		return -EFAULT;
-
 	if (!device_iommu_capable(dma_dev, IOMMU_CAP_CACHE_COHERENCY)) {
 		dev_warn_once(&v->dev,
 			      "Failed to allocate domain, device is not IOMMU cache coherent capable\n");
 		return -ENOTSUPP;
 	}
 
-	v->domain = iommu_domain_alloc(bus);
-	if (!v->domain)
-		return -EIO;
+	v->domain = iommu_paging_domain_alloc(dma_dev);
+	if (IS_ERR(v->domain)) {
+		ret = PTR_ERR(v->domain);
+		v->domain = NULL;
+		return ret;
+	}
 
 	ret = iommu_attach_device(v->domain, dma_dev);
 	if (ret)
-- 
2.34.1