netdev - Re: [PATCH net-next] qed: Set error code for allocation failures

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Date:   Sun, 29 Oct 2017 07:50:06 +0000
From:   "Kalderon, Michal" <Michal.Kalderon@...ium.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>,
        "Elior, Ariel" <Ariel.Elior@...ium.com>
CC:     Dept-Eng Everest Linux L2 <Dept-EngEverestLinuxL2@...ium.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: Re: [PATCH net-next] qed: Set error code for allocation failures

From: Dan Carpenter <dan.carpenter@...cle.com>
Sent: Friday, October 27, 2017 9:40 AM

> There are several places where we accidentally return success when
> kcalloc() fails.
> 
> Fixes: fcb39f6c10b2 ("qed: Add mpa buffer descriptors for storing and processing mpa fpdus")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
>
> diff --git a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
> index 409041eab189..6366f2ef82b7 100644
> --- a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
> +++ b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
> @@ -2585,7 +2585,7 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
>         struct qed_ll2_cbs cbs;
>         u32 mpa_buff_size;
>         u16 n_ooo_bufs;
> -       int rc = 0;
> +       int rc;
>         int i;
> 
>         iwarp_info = &p_hwfn->p_rdma_info->iwarp;
> @@ -2696,6 +2696,7 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
>         if (rc)
>                goto err;
> 
> +       rc = -ENOMEM;
>         iwarp_info->partial_fpdus = kcalloc((u16)p_hwfn->p_rdma_info->num_qps,
>                                             sizeof(*iwarp_info->partial_fpdus),
>                                             GFP_KERNEL);
> @@ -2724,7 +2725,7 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
>         for (i = 0; i < data.input.rx_num_desc; i++)
>                 list_add_tail(&iwarp_info->mpa_bufs[i].list_entry,
>                               &iwarp_info->mpa_buf_list);
> -       return rc;
> +       return 0;
>  err:
>         qed_iwarp_ll2_stop(p_hwfn, p_ptt);

Thanks Dan,
Acked-by: Michal Kalderon <michal.kalderon@...ium.com>