netdev - Re: [PATCH v2 02/15] ethernet/839: use new module_firmware

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Date:   Sat, 16 May 2020 00:04:48 -0400
From:   Rafael Aquini <aquini@...hat.com>
To:     Luis Chamberlain <mcgrof@...nel.org>
Cc:     jeyu@...nel.org, akpm@...ux-foundation.org, arnd@...db.de,
        rostedt@...dmis.org, mingo@...hat.com, cai@....pw,
        dyoung@...hat.com, bhe@...hat.com, peterz@...radead.org,
        tglx@...utronix.de, gpiccoli@...onical.com, pmladek@...e.com,
        tiwai@...e.de, schlad@...e.de, andriy.shevchenko@...ux.intel.com,
        keescook@...omium.org, daniel.vetter@...ll.ch, will@...nel.org,
        mchehab+samsung@...nel.org, kvalo@...eaurora.org,
        davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Shannon Nelson <snelson@...sando.io>,
        Jakub Kicinski <kuba@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH v2 02/15] ethernet/839: use new module_firmware_crashed()

On Fri, May 15, 2020 at 09:28:33PM +0000, Luis Chamberlain wrote:
> This makes use of the new module_firmware_crashed() to help
> annotate when firmware for device drivers crash. When firmware
> crashes devices can sometimes become unresponsive, and recovery
> sometimes requires a driver unload / reload and in the worst cases
> a reboot.
> 
> Using a taint flag allows us to annotate when this happens clearly.
> 
> Cc: "Michael S. Tsirkin" <mst@...hat.com>
> Cc: Shannon Nelson <snelson@...sando.io>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Heiner Kallweit <hkallweit1@...il.com>
> Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
> ---
>  drivers/net/ethernet/8390/axnet_cs.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/8390/axnet_cs.c b/drivers/net/ethernet/8390/axnet_cs.c
> index aeae7966a082..8ad0200db8e9 100644
> --- a/drivers/net/ethernet/8390/axnet_cs.c
> +++ b/drivers/net/ethernet/8390/axnet_cs.c
> @@ -1358,9 +1358,11 @@ static void ei_receive(struct net_device *dev)
>  		 */
>  		if ((netif_msg_rx_err(ei_local)) &&
>  		    this_frame != ei_local->current_page &&
> -		    (this_frame != 0x0 || rxing_page != 0xFF))
> +		    (this_frame != 0x0 || rxing_page != 0xFF)) {
> +			module_firmware_crashed();
>  			netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
>  				   this_frame, ei_local->current_page);
> +		}
>  		
>  		if (this_frame == rxing_page)	/* Read all the frames? */
>  			break;				/* Done for now */
> -- 
> 2.26.2
> 
Acked-by: Rafael Aquini <aquini@...hat.com>