netdev - Re: [PATCH net-next v2 1/3] net/ncsi: Fix several packet definitions

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Message-ID: <CACPK8Xcs+jp39QPVVwebdo6SHwSw=wNSj49c_9PYnYFSWLrphg@mail.gmail.com>
Date:   Mon, 14 Aug 2017 11:40:12 +0930
From:   Joel Stanley <joel@....id.au>
To:     Samuel Mendoza-Jonas <sam@...dozajonas.com>
Cc:     "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Gavin Shan <gwshan@...ux.vnet.ibm.com>,
        Ratan K Gupta <ratagupt@...ibm.com>
Subject: Re: [PATCH net-next v2 1/3] net/ncsi: Fix several packet definitions

On Mon, Aug 14, 2017 at 10:59 AM, Samuel Mendoza-Jonas
<sam@...dozajonas.com> wrote:

I asked Sam if these should be backported to stable and he said:

> These are straight up bugs except... without my changes we never call
> this code. As Ben says as time provides a lot of the current definitions
> need to be gone over, there's a few command/response code paths that are
> never triggered and could be broken in similar ways.

So we're okay here.

> Signed-off-by: Samuel Mendoza-Jonas <sam@...dozajonas.com>

Reviewed-by: Joel Stanley <joel@....id.au>

Cheers,

Joel

> ---
> v2: Rebased on latest net-next
>
>  net/ncsi/ncsi-cmd.c | 10 +++++-----
>  net/ncsi/ncsi-pkt.h |  2 +-
>  net/ncsi/ncsi-rsp.c |  3 ++-
>  3 files changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
> index 5e03ed190e18..7567ca63aae2 100644
> --- a/net/ncsi/ncsi-cmd.c
> +++ b/net/ncsi/ncsi-cmd.c
> @@ -139,9 +139,9 @@ static int ncsi_cmd_handler_svf(struct sk_buff *skb,
>         struct ncsi_cmd_svf_pkt *cmd;
>
>         cmd = skb_put_zero(skb, sizeof(*cmd));
> -       cmd->vlan = htons(nca->words[0]);
> -       cmd->index = nca->bytes[2];
> -       cmd->enable = nca->bytes[3];
> +       cmd->vlan = htons(nca->words[1]);
> +       cmd->index = nca->bytes[6];
> +       cmd->enable = nca->bytes[7];
>         ncsi_cmd_build_header(&cmd->cmd.common, nca);
>
>         return 0;
> @@ -153,7 +153,7 @@ static int ncsi_cmd_handler_ev(struct sk_buff *skb,
>         struct ncsi_cmd_ev_pkt *cmd;
>
>         cmd = skb_put_zero(skb, sizeof(*cmd));
> -       cmd->mode = nca->bytes[0];
> +       cmd->mode = nca->bytes[3];
>         ncsi_cmd_build_header(&cmd->cmd.common, nca);
>
>         return 0;
> @@ -228,7 +228,7 @@ static struct ncsi_cmd_handler {
>         { NCSI_PKT_CMD_AE,     8, ncsi_cmd_handler_ae      },
>         { NCSI_PKT_CMD_SL,     8, ncsi_cmd_handler_sl      },
>         { NCSI_PKT_CMD_GLS,    0, ncsi_cmd_handler_default },
> -       { NCSI_PKT_CMD_SVF,    4, ncsi_cmd_handler_svf     },
> +       { NCSI_PKT_CMD_SVF,    8, ncsi_cmd_handler_svf     },
>         { NCSI_PKT_CMD_EV,     4, ncsi_cmd_handler_ev      },
>         { NCSI_PKT_CMD_DV,     0, ncsi_cmd_handler_default },
>         { NCSI_PKT_CMD_SMA,    8, ncsi_cmd_handler_sma     },
> diff --git a/net/ncsi/ncsi-pkt.h b/net/ncsi/ncsi-pkt.h
> index 3ea49ed0a935..91b4b66438df 100644
> --- a/net/ncsi/ncsi-pkt.h
> +++ b/net/ncsi/ncsi-pkt.h
> @@ -104,7 +104,7 @@ struct ncsi_cmd_svf_pkt {
>         unsigned char           index;     /* VLAN table index  */
>         unsigned char           enable;    /* Enable or disable */
>         __be32                  checksum;  /* Checksum          */
> -       unsigned char           pad[14];
> +       unsigned char           pad[18];
>  };
>
>  /* Enable VLAN */
> diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
> index 087db775b3dc..c1a191d790e2 100644
> --- a/net/ncsi/ncsi-rsp.c
> +++ b/net/ncsi/ncsi-rsp.c
> @@ -354,7 +354,8 @@ static int ncsi_rsp_handler_svf(struct ncsi_request *nr)
>
>         /* Add or remove the VLAN filter */
>         if (!(cmd->enable & 0x1)) {
> -               ret = ncsi_remove_filter(nc, NCSI_FILTER_VLAN, cmd->index);
> +               /* HW indexes from 1 */
> +               ret = ncsi_remove_filter(nc, NCSI_FILTER_VLAN, cmd->index - 1);
>         } else {
>                 vlan = ntohs(cmd->vlan);
>                 ret = ncsi_add_filter(nc, NCSI_FILTER_VLAN, &vlan);
> --
> 2.14.0
>