linux-kernel - Re: [PATCH v2 12/27] thunderbolt: Refactor and fix parsing of port drom entries

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Message-ID: <CAHp75VehAc0SRsVTL3P3RxwDOqarNpYoRKbN--NR_-S8LEH7Vw@mail.gmail.com>
Date:   Sat, 27 May 2017 18:46:53 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <yehezkel.bernat@...el.com>,
        Lukas Wunner <lukas@...ner.de>,
        Amir Levy <amir.jer.levy@...el.com>,
        Andy Lutomirski <luto@...nel.org>,
        Mario Limonciello <Mario.Limonciello@...l.com>,
        Jared.Dominguez@...l.com,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 12/27] thunderbolt: Refactor and fix parsing of port
 drom entries

On Fri, May 26, 2017 at 7:09 PM, Mika Westerberg
<mika.westerberg@...ux.intel.com> wrote:
> From: Lukas Wunner <lukas@...ner.de>
>
> Currently tb_drom_parse_entry() is only able to parse drom entries of
> type TB_DROM_ENTRY_PORT. Rename it to tb_drom_parse_entry_port().
> Fold tb_drom_parse_port_entry() into it.
>
> Its return value is currently ignored. Evaluate it and abort parsing on
> error.
>
> Change tb_drom_parse_entries() to accommodate for parsing of other entry
> types than TB_DROM_ENTRY_PORT.
>

FWIW:
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Signed-off-by: Lukas Wunner <lukas@...ner.de>
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
>  drivers/thunderbolt/eeprom.c | 32 ++++++++++++++++----------------
>  1 file changed, 16 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/thunderbolt/eeprom.c b/drivers/thunderbolt/eeprom.c
> index e2c1f8a45522..5c7d80a109b1 100644
> --- a/drivers/thunderbolt/eeprom.c
> +++ b/drivers/thunderbolt/eeprom.c
> @@ -295,25 +295,13 @@ int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid)
>         return 0;
>  }
>
> -static void tb_drom_parse_port_entry(struct tb_port *port,
> -               struct tb_drom_entry_port *entry)
> -{
> -       port->link_nr = entry->link_nr;
> -       if (entry->has_dual_link_port)
> -               port->dual_link_port =
> -                               &port->sw->ports[entry->dual_link_port_nr];
> -}
> -
> -static int tb_drom_parse_entry(struct tb_switch *sw,
> -               struct tb_drom_entry_header *header)
> +static int tb_drom_parse_entry_port(struct tb_switch *sw,
> +                                   struct tb_drom_entry_header *header)
>  {
>         struct tb_port *port;
>         int res;
>         enum tb_port_type type;
>
> -       if (header->type != TB_DROM_ENTRY_PORT)
> -               return 0;
> -
>         port = &sw->ports[header->index];
>         port->disabled = header->port_disabled;
>         if (port->disabled)
> @@ -332,7 +320,10 @@ static int tb_drom_parse_entry(struct tb_switch *sw,
>                                 header->len, sizeof(struct tb_drom_entry_port));
>                         return -EIO;
>                 }
> -               tb_drom_parse_port_entry(port, entry);
> +               port->link_nr = entry->link_nr;
> +               if (entry->has_dual_link_port)
> +                       port->dual_link_port =
> +                               &port->sw->ports[entry->dual_link_port_nr];
>         }
>         return 0;
>  }
> @@ -347,6 +338,7 @@ static int tb_drom_parse_entries(struct tb_switch *sw)
>         struct tb_drom_header *header = (void *) sw->drom;
>         u16 pos = sizeof(*header);
>         u16 drom_size = header->data_len + TB_DROM_DATA_START;
> +       int res;
>
>         while (pos < drom_size) {
>                 struct tb_drom_entry_header *entry = (void *) (sw->drom + pos);
> @@ -356,7 +348,15 @@ static int tb_drom_parse_entries(struct tb_switch *sw)
>                         return -EIO;
>                 }
>
> -               tb_drom_parse_entry(sw, entry);
> +               switch (entry->type) {
> +               case TB_DROM_ENTRY_GENERIC:
> +                       break;
> +               case TB_DROM_ENTRY_PORT:
> +                       res = tb_drom_parse_entry_port(sw, entry);
> +                       break;
> +               }
> +               if (res)
> +                       return res;
>
>                 pos += entry->len;
>         }
> --
> 2.11.0
>



-- 
With Best Regards,
Andy Shevchenko