linux-kernel - Re: [PATCH net-next] bnxt_en: combine 'else if' and 'else' into single branche

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Message-ID: <CAACQVJo8zB2H6AtQZEVK-nfg8j0f9oVPrBSMjq+CKoQ+xeVrUA@mail.gmail.com>
Date:   Thu, 26 Jul 2018 20:24:34 +0530
From:   Vasundhara Volam <vasundhara-v.volam@...adcom.com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     David Miller <davem@...emloft.net>,
        "michael.chan@...adcom.com" <michael.chan@...adcom.com>,
        open list <linux-kernel@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] bnxt_en: combine 'else if' and 'else' into
 single branche

On Wed, Jul 25, 2018 at 4:44 PM, YueHaibing <yuehaibing@...wei.com> wrote:
>
> The else-if branch and else branch set mac_ok to true similarly,
> so combine the two into single else branch.
>
> Aslo add comments to explain the two conditions, which
> from Michael Chan and Vasundhara Volam.
>
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
> index a649108..f560845 100644
> --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
> +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c
> @@ -956,9 +956,13 @@ static int bnxt_vf_validate_set_mac(struct bnxt *bp, struct bnxt_vf_info *vf)
>         } else if (is_valid_ether_addr(vf->vf_mac_addr)) {
>                 if (ether_addr_equal((const u8 *)req->l2_addr, vf->vf_mac_addr))
>                         mac_ok = true;
> -       } else if (bp->hwrm_spec_code < 0x10202) {
> -               mac_ok = true;
>         } else {
> +               /* There are two cases:
> +                * 1.If firmware spec < 0x10202,VF MAC address is not forwarded
> +                *   to the PF and so it doesn't have to match
> +                * 2.Allow VF to modify it's own MAC when PF has not assigned a
> +                *   valid MAC address and firmware spec >= 0x10202
> +                */
No, this is not correct either. You are not covering both conditions.
else part with cover if (!is_valid_ether_addr(vf->vf_mac_addr))
before.
>                 mac_ok = true;
>         }
>         if (mac_ok)
> --
> 2.7.0
>
>