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    Subject[PATCH 4.9 060/329] RDMA/mlx5: Avoid memory leak in case of XRCD dealloc failure
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Leon Romanovsky <leonro@mellanox.com>

    [ Upstream commit b081808a66345ba725b77ecd8d759bee874cd937 ]

    Failure in XRCD FW deallocation command leaves memory leaked and
    returns error to the user which he can't do anything about it.

    This patch changes behavior to always free memory and always return
    success to the user.

    Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
    Reviewed-by: Majd Dibbiny <majd@mellanox.com>
    Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
    Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
    Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/infiniband/hw/mlx5/qp.c | 5 +----
    1 file changed, 1 insertion(+), 4 deletions(-)

    --- a/drivers/infiniband/hw/mlx5/qp.c
    +++ b/drivers/infiniband/hw/mlx5/qp.c
    @@ -4610,13 +4610,10 @@ int mlx5_ib_dealloc_xrcd(struct ib_xrcd
    int err;

    err = mlx5_core_xrcd_dealloc(dev->mdev, xrcdn);
    - if (err) {
    + if (err)
    mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n", xrcdn);
    - return err;
    - }

    kfree(xrcd);
    -
    return 0;
    }


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