linux-kernel - [PATCH 5.16 014/121] vduse: Fix returning wrong type in vduse_domain_alloc

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Date:   Mon, 14 Mar 2022 12:53:17 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Xie Yongji <xieyongji@...edance.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 014/121] vduse: Fix returning wrong type in vduse_domain_alloc_iova()

From: Xie Yongji <xieyongji@...edance.com>

[ 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@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Xie Yongji <xieyongji@...edance.com>
Link: https://lore.kernel.org/r/20220121083940.102-1-xieyongji@bytedance.com
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
Acked-by: Jason Wang <jasowang@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/vdpa/vdpa_user/iova_domain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vdpa/vdpa_user/iova_domain.c b/drivers/vdpa/vdpa_user/iova_domain.c
index 1daae2608860..0678c2514197 100644
--- 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,
-- 
2.34.1