linux-kernel - Re: [PATCH v3 0/1] can: ucan: add driver for Theobroma Systems UCAN devices

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Date:   Fri, 23 Mar 2018 10:40:01 +0100
From:   Jakob Unterwurzacher <jakob.unterwurzacher@...obroma-systems.com>
To:     Wolfgang Grandegger <wg@...ndegger.com>
Cc:     Martin Elshuber <martin.elshuber@...obroma-systems.com>,
        Philipp Tomsich <philipp.tomsich@...obroma-systems.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        linux-can@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/1] can: ucan: add driver for Theobroma Systems UCAN
 devices

On 23.03.18 09:32, Wolfgang Grandegger wrote:
>> * add __func__ to all errors and warnings, and to info where it made sense
> 
> The final output messages in the driver should especially be useful for
> the end user... and not the developer! This is also true for the
> function names. You already use more "__func__" than all other CAN
> drivers together. Just my opinion!

The idea was to make it clear which driver printed the message. In my 
opinion, this is a problem:

> drivers/net/can/usb$ git grep "No memory left for USB buffer"
> ems_usb.c:                      netdev_err(netdev, "No memory left for USB buffer\n");
> ems_usb.c:              netdev_err(netdev, "No memory left for USB buffer\n");
> esd_usb2.c:                              "No memory left for USB buffer\n");
> esd_usb2.c:             netdev_err(netdev, "No memory left for USB buffer\n");
> gs_usb.c:               netdev_err(netdev, "No memory left for USB buffer\n");
> gs_usb.c:                                          "No memory left for USB buffer\n");
> kvaser_usb.c:                            "No memory left for USB buffer\n");
> mcba_usb.c:                     netdev_err(netdev, "No memory left for USB buffer\n");
> usb_8dev.c:             netdev_err(netdev, "No memory left for USB buffer\n");
> usb_8dev.c:                     netdev_err(netdev, "No memory left for USB buffer\n");

But I'm open to other suggestions (use a fixed "ucan: " prefix?) or to 
drop it entirely if you think it is not worth it.

Thanks for the feedback,
Jakob