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Subject[PATCH 4.19 35/84] RDMA/mlx5: Return proper error value
Date
From: Leon Romanovsky <leonro@mellanox.com>

commit 546d30099ed204792083f043cd7e016de86016a3 upstream.

Returned value from mlx5_mr_cache_alloc() is checked to be error or real
pointer. Return proper error code instead of NULL which is not checked
later.

Fixes: 81713d3788d2 ("IB/mlx5: Add implicit MR support")
Link: https://lore.kernel.org/r/20191029055721.7192-1-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/infiniband/hw/mlx5/mr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -457,7 +457,7 @@ struct mlx5_ib_mr *mlx5_mr_cache_alloc(s

if (entry < 0 || entry >= MAX_MR_CACHE_ENTRIES) {
mlx5_ib_err(dev, "cache entry %d is out of range\n", entry);
- return NULL;
+ return ERR_PTR(-EINVAL);
}

ent = &cache->ent[entry];

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