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Date:   Sun, 4 Oct 2020 11:39:45 +0200
From:   Marc Kleine-Budde <>
To:     Vincent Mailhol <>,
Cc:     Oliver Hartkopp <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,,
Subject: Re: [PATCH] can: raw: add missing error queue support

On 9/26/20 6:24 PM, Vincent Mailhol wrote:
> Error queue are not yet implemented in CAN-raw sockets.
> The problem: a userland call to recvmsg(soc, msg, MSG_ERRQUEUE) on a
> CAN-raw socket would unqueue messages from the normal queue without
> any kind of error or warning. As such, it prevented CAN drivers from
> using the functionalities that relies on the error queue such as
> skb_tx_timestamp().
> SCM_CAN_RAW_ERRQUEUE is defined as the type for the CAN raw error
> queue. SCM stands for "Socket control messages". The name is inspired
> from SCM_J1939_ERRQUEUE of include/uapi/linux/can/j1939.h.
> Signed-off-by: Vincent Mailhol <>

Applied to linux-can-next.


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

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