linux-kernel - Re: [PATCH 1/2] can: D_CAN: perform a sofware reset on open

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Message-ID: <20191001133956.GB32369@x1.vandijck-laurijssen.be>
Date:   Tue, 1 Oct 2019 15:39:56 +0200
From:   Kurt Van Dijck <dev.kurt@...dijck-laurijssen.be>
To:     Jeroen Hofstee <jhofstee@...tronenergy.com>
Cc:     "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        "open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] can: D_CAN: perform a sofware reset on open

On do, 26 sep 2019 08:50:44 +0000, Jeroen Hofstee wrote:
> When the C_CAN interface is closed it is put in power down mode, but
> does not reset the error counters / state. So reset the D_CAN on open,
> so the reported state and the actual state match.
> 
> According to [1], the C_CAN module doesn't have the software reset.
> 
> [1] http://www.bosch-semiconductors.com/media/ip_modules/pdf_2/c_can_fd8/users_manual_c_can_fd8_r210_1.pdf
> 
> Signed-off-by: Jeroen Hofstee <jhofstee@...tronenergy.com>

I observed no problems after applying the patch.

Tested-by: Kurt Van Dijck <dev.kurt@...dijck-laurijssen.be>