vduse: Fix returning wrong type in vduse_domain_alloc_iova()

BugLink: https://bugs.launchpad.net/bugs/1966056
[ Upstream commit b9d102dafec6af1c07b610faf0a6d4e8aee14ae0 ]

This fixes the following smatch warnings:

drivers/vdpa/vdpa_user/iova_domain.c:305 vduse_domain_alloc_iova() warn: should 'iova_pfn << shift' be a 64 bit type?

Fixes: 8c773d53fb7b ("vduse: Implement an MMU-based software IOTLB")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20220121083940.102-1-xieyongji@bytedance.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/drivers/vdpa/vdpa_user/iova_domain.c b/drivers/vdpa/vdpa_user/iova_domain.c
index 1daae26088609db6a7f8a029413ccd1022294164..0678c251419736ea26c582b3f97819b7f4563a4a 100644 (file)
--- a/drivers/vdpa/vdpa_user/iova_domain.c
+++ b/drivers/vdpa/vdpa_user/iova_domain.c
@@ -302,7 +302,7 @@ vduse_domain_alloc_iova(struct iova_domain *iovad,
                iova_len = roundup_pow_of_two(iova_len);
        iova_pfn = alloc_iova_fast(iovad, iova_len, limit >> shift, true);
 
-       return iova_pfn << shift;
+       return (dma_addr_t)iova_pfn << shift;
 }
 
 static void vduse_domain_free_iova(struct iova_domain *iovad,