iommu/sva: Fix SVA handle sharing in multi device case

iommu_sva_bind_device will directly goto out in multi-device
case when found existing domain, ignoring list_add handle,
which causes the handle to fail to be shared.

Fixes: 65d4418 ("iommu/sva: Restore SVA handle sharing")
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20240227064821.128-1-zhangfei.gao@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: zhangfeigao

drivers/iommu/iommu-sva.c

@@ -117,11 +117,11 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm
 	if (ret)
 		goto out_free_domain;
 	domain->users = 1;
-	refcount_set(&handle->users, 1);
 	list_add(&domain->next, &mm->iommu_mm->sva_domains);
-	list_add(&handle->handle_item, &mm->iommu_mm->sva_handles);
 
 out:
+	refcount_set(&handle->users, 1);
+	list_add(&handle->handle_item, &mm->iommu_mm->sva_handles);
 	mutex_unlock(&iommu_sva_lock);
 	handle->dev = dev;
 	handle->domain = domain;