linux-kernel - Re: [PATCH][next] RDMA/mlx5: Fix missing assignment of rc when calling mlx5_ib_dereg

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Message-ID: <YFI2jt/nTpn//Zc0@unreal>
Date:   Wed, 17 Mar 2021 19:04:14 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Colin King <colin.king@...onical.com>
Cc:     Doug Ledford <dledford@...hat.com>, Jason Gunthorpe <jgg@...pe.ca>,
        linux-rdma@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] RDMA/mlx5: Fix missing assignment of rc when
 calling mlx5_ib_dereg_mr

On Tue, Mar 16, 2021 at 09:51:17AM +0000, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
>
> The assignment of the return code to rc when calling mlx5_ib_dereg_mr is
> missing and there is an error check on an uninitialized rc. Fix this by
> adding in the assignment.
>
> Addresses-Coverity: ("Uninitialized scalar variable")
> Fixes: e6fb246ccafb ("RDMA/mlx5: Consolidate MR destruction to mlx5_ib_dereg_mr()")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/infiniband/hw/mlx5/mr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

It was already sent, thanks.
https://lore.kernel.org/linux-rdma/20210314082250.10143-1-leon@kernel.org/

>
> diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
> index 86ffc7e5ef96..9dcb9fb4eeaa 100644
> --- a/drivers/infiniband/hw/mlx5/mr.c
> +++ b/drivers/infiniband/hw/mlx5/mr.c
> @@ -1946,7 +1946,7 @@ int mlx5_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
>  			mr->mtt_mr = NULL;
>  		}
>  		if (mr->klm_mr) {
> -			mlx5_ib_dereg_mr(&mr->klm_mr->ibmr, NULL);
> +			rc = mlx5_ib_dereg_mr(&mr->klm_mr->ibmr, NULL);
>  			if (rc)
>  				return rc;
>  			mr->klm_mr = NULL;
> --
> 2.30.2
>