linux-kernel - Re: [PATCH v10 1/5] serdev: Make .remove in struct serdev_device

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Message-ID: <20171104112431.GA24583@kroah.com>
Date:   Sat, 4 Nov 2017 12:24:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        Rob Herring <robh@...nel.org>, cphealy@...il.com,
        Guenter Roeck <linux@...ck-us.net>,
        Lucas Stach <l.stach@...gutronix.de>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        Lee Jones <lee.jones@...aro.org>, Pavel Machek <pavel@....cz>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Johan Hovold <johan@...nel.org>,
        Sebastian Reichel <sebastian.reichel@...labora.co.uk>
Subject: Re: [PATCH v10 1/5] serdev: Make .remove in struct
 serdev_device_driver optional

On Tue, Oct 31, 2017 at 09:36:52AM -0700, Andrey Smirnov wrote:
> Using devres infrastructure it is possible to write a serdev driver
> that doesn't have any code that needs to be called as a part of
> .remove. Add code to make .remove optional.

What about manual unbind from userspace through sysfs?  You need to have
a remove function.  All drivers need that, to not have it is pretty lazy :)

thanks,

greg k-h