linux-kernel - Re: [PATCH v3] can, tty: elmcan CAN/ldisc driver for ELM327 based OBD-II adapters

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Date:   Thu, 17 Mar 2022 21:23:59 +0100
From:   Max Staudt <max@...as.org>
To:     Marc Kleine-Budde <mkl@...gutronix.de>
Cc:     Vincent Mailhol <vincent.mailhol@...il.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        linux-can@...r.kernel.org, Oliver Neukum <oneukum@...e.com>,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>
Subject: Re: [PATCH v3] can, tty: elmcan CAN/ldisc driver for ELM327 based
 OBD-II adapters

On Mon, 14 Mar 2022 23:04:08 +0100
Marc Kleine-Budde <mkl@...gutronix.de> wrote:

> On 09.03.2022 22:49:49, Vincent Mailhol wrote:
> > Either we agree that using can_rx_offload without implementing
> > the mailbox_read() is OK and in that case, the can_rx_offload
> > framework should be modified to allow mailbox_read() to be a NULL
> > pointer.
> > 
> > Either it is not the case and you use the more classic
> > netif_rx().
> > 
> > And I do not have the answer. I haven't studied can_rx_offload
> > enough to be a judge here. Sorry.
> > 
> > @Marc, any thoughts?  
> 
> Use can_rx_offload_add_manual() instead.

m-(

Yes, it's right underneath _add_fifo() and does the right thing. No
idea how I missed it, I thought I had looked through all variants.

Thanks!


> > Also give a look at can_dropped_invalid_skb().  
> 
> ACK

Done.


> Marc

Max