[PATCH 5.9 388/391] vdpa/mlx5: Fix error return in map_direct_mr()

[Greg Kroah-Hartman]

From: Jing Xiangfeng <jingxiangf...@huawei.com>

commit 7ba08e81cb4aec9724ab7674a5de49e7a341062c upstream.

Fix to return the variable "err" from the error handling case instead
of "ret".

Fixes: 94abbccdf291 ("vdpa/mlx5: Add shared memory registration code")
Signed-off-by: Jing Xiangfeng <jingxiangf...@huawei.com>
Link: https://lore.kernel.org/r/20201026070637.164321-1-jingxiangf...@huawei.com
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
Acked-by: Eli Cohen <e...@nvidia.com>
Cc: sta...@vger.kernel.org
Acked-by: Jason Wang <jasow...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/vdpa/mlx5/core/mr.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/vdpa/mlx5/core/mr.c
+++ b/drivers/vdpa/mlx5/core/mr.c
@@ -239,7 +239,6 @@ static int map_direct_mr(struct mlx5_vdp
        u64 paend;
        struct scatterlist *sg;
        struct device *dma = mvdev->mdev->device;
-       int ret;
 
        for (map = vhost_iotlb_itree_first(iotlb, mr->start, mr->end - 1);
             map; map = vhost_iotlb_itree_next(map, start, mr->end - 1)) {
@@ -277,8 +276,8 @@ static int map_direct_mr(struct mlx5_vdp
 done:
        mr->log_size = log_entity_size;
        mr->nsg = nsg;
-       ret = dma_map_sg_attrs(dma, mr->sg_head.sgl, mr->nsg, 
DMA_BIDIRECTIONAL, 0);
-       if (!ret)
+       err = dma_map_sg_attrs(dma, mr->sg_head.sgl, mr->nsg, 
DMA_BIDIRECTIONAL, 0);
+       if (!err)
                goto err_map;
 
        err = create_direct_mr(mvdev, mr);