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Subject: Re: [PATCH] can: enable multi-queue for SocketCAN devices
To:     "Jonas Mark (BT-FIR/ENG1)" <Mark.Jonas@de.bosch.com>,
        Wolfgang Grandegger <wg@grandegger.com>
Cc:     "linux-can@vger.kernel.org" <linux-can@vger.kernel.org>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "hs@denx.de" <hs@denx.de>,
        "ZHU Yi (BT-FIR/ENG1-Zhu)" <Yi.Zhu5@cn.bosch.com>
References: <9ce65a3a1535456dbad7120c5775a8f9@de.bosch.com>
From:   Marc Kleine-Budde <mkl@pengutronix.de>
Message-ID: <7cd5b1e3-5d86-1f3c-e651-448d696a0823@pengutronix.de>
Date:   Wed, 14 Mar 2018 13:44:34 +0100
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From: Marc Kleine-Budde <mkl@pengutronix.de>
To: "Jonas Mark (BT-FIR/ENG1)" <Mark.Jonas@de.bosch.com>,
 Wolfgang Grandegger <wg@grandegger.com>
Cc: "linux-can@vger.kernel.org" <linux-can@vger.kernel.org>,
 "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
 "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
 "hs@denx.de" <hs@denx.de>, "ZHU Yi (BT-FIR/ENG1-Zhu)" <Yi.Zhu5@cn.bosch.com>
Message-ID: <7cd5b1e3-5d86-1f3c-e651-448d696a0823@pengutronix.de>
Subject: Re: [PATCH] can: enable multi-queue for SocketCAN devices
References: <9ce65a3a1535456dbad7120c5775a8f9@de.bosch.com>
In-Reply-To: <9ce65a3a1535456dbad7120c5775a8f9@de.bosch.com>

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On 03/14/2018 01:26 PM, Jonas Mark (BT-FIR/ENG1) wrote:
>> Do you have a driver or a patch to make a driver mq aware?
>=20
> Yes, we have CAN hardware with multiple queues and we also have a
> SocketCAN driver for it.
>=20
> IMHO the driver will be of very little use for the Linux community
> because the HW is proprietary.

That doesn't matter. It would be the first driver that makes use of the
feature, so we can learn from it. And you might get a free review of
your driver.

> Our motivation to separate this patch from the proprietary SocketCAN
> driver

Looking at your email address I assume your employer sells devices with
this hardware and the driver. So someone has to provide the sources for
it anyways to fulfil the GPL license requirements. :)

> is that we felt it was odd that the multi-queue infrastructure is in
> place and only very few lines of code are missing to offer it to the
> CAN networking subsystem as well.

Marc

--=20
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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