linux-kernel - Re: [PATCH v6] can: usb: etas_es58X: add support for ETAS ES58X CAN USB interfaces

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Message-ID: <d10afef7-4712-e627-cecb-1007bcee715c@pengutronix.de>
Date:   Mon, 16 Nov 2020 16:02:15 +0100
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Vincent MAILHOL <mailhol.vincent@...adoo.fr>
Cc:     linux-can <linux-can@...r.kernel.org>,
        Oliver Hartkopp <socketcan@...tkopp.net>,
        Arunachalam Santhanam <arunachalam.santhanam@...bosch.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>
Subject: Re: [PATCH v6] can: usb: etas_es58X: add support for ETAS ES58X CAN
 USB interfaces

On 11/16/20 3:44 PM, Vincent MAILHOL wrote:
> On Mon. 16 Nov 2020 at 03:55, Marc Kleine-Budde wrote:
>> On 11/14/20 4:22 PM, Vincent Mailhol wrote:
>>> This driver supports the ES581.4, ES582.1 and ES584.1 interfaces from
>>> ETAS GmbH (https://www.etas.com/en/products/es58x.php).
>>>
>>> Co-developed-by: Arunachalam Santhanam <arunachalam.santhanam@...bosch.com>
>>> Signed-off-by: Arunachalam Santhanam <arunachalam.santhanam@...bosch.com>
>>> Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
>>
>> The driver fails to compile with CONFIG_SYSFS switched off
>>
>>   CC [M]  drivers/net/can/usb/etas_es58x/es58x_core.o
>> drivers/net/can/usb/etas_es58x/es58x_core.c: In function ‘es58x_init_netdev’:
>> drivers/net/can/usb/etas_es58x/es58x_core.c:2380:32: error: ‘struct netdev_queue’ has no member named ‘dql’
>>  2380 |  netdev_get_tx_queue(netdev, 0)->dql.min_limit =
>>       |                                ^~
> 
> Thanks, nice catch!
> CONFIG_SYSFS is an expert setting, I totally missed that one. Took me
> actually a couple of minutes navigating in the menuconfig to find how
> to remove the option.

me too :)

> The root cause is actually on CONFIG_BQL (which depends on
> CONFIG_SYSFS).
> Reference: https://elixir.bootlin.com/linux/latest/source/include/linux/netdevice.h#L636
> 
> Will send a v7 patch right after.
> 
> Out of curiosity, how did you find this? Did you find it during a code
> review or did you just happen to have a .config with CONFIG_SYSFS

During code review, I found that the dql had a ifdef CONFIG_SYSFS.

Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |



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