linux-kernel - Re: [PATCH v2] can: m_can: add support for handling arbitration error

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Message-ID: <20191025111626.GA31153@netronome.com>
Date:   Fri, 25 Oct 2019 13:16:27 +0200
From:   Simon Horman <simon.horman@...ronome.com>
To:     Pankaj Sharma <pankj.sharma@...sung.com>
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, wg@...ndegger.com,
        mkl@...gutronix.de, davem@...emloft.net,
        eugen.hristev@...rochip.com, ludovic.desroches@...rochip.com,
        pankaj.dubey@...sung.com, rcsekar@...sung.com,
        jhofstee@...tronenergy.com, Sriram Dash <sriram.dash@...sung.com>
Subject: Re: [PATCH v2] can: m_can: add support for handling arbitration error

On Mon, Oct 21, 2019 at 05:43:36PM +0530, Pankaj Sharma wrote:
> The Bosch MCAN hardware (3.1.0 and above) supports interrupt flag to
> detect Protocol error in arbitration phase.
> 
> Transmit error statistics is currently not updated from the MCAN driver.
> Protocol error in arbitration phase is a TX error and the network
> statistics should be updated accordingly.
> 
> The member "tx_error" of "struct net_device_stats" should be incremented
> as arbitration is a transmit protocol error. Also "arbitration_lost" of
> "struct can_device_stats" should be incremented to report arbitration
> lost.
> 
> Signed-off-by: Pankaj Sharma <pankj.sharma@...sung.com>
> Signed-off-by: Sriram Dash <sriram.dash@...sung.com>
> ---
> 
> changes in v2:
> - common m_can_ prefix for is_protocol_err function
> - handling stats even if the allocation of the skb fails
> - resolving build errors on net-next branch

No objections from my side.