linux-kernel - Re: [PATCH] rfkill: allocate static minor

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Message-ID: <20191024184408.GA260560@kroah.com>
Date:   Thu, 24 Oct 2019 14:44:08 -0400
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Marcel Holtmann <marcel@...tmann.org>
Cc:     arnd@...db.de, johannes@...solutions.net, davem@...emloft.net,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH] rfkill: allocate static minor

On Thu, Oct 24, 2019 at 07:40:42PM +0200, Marcel Holtmann wrote:
> udev has a feature of creating /dev/<node> device-nodes if it finds
> a devnode:<node> modalias. This allows for auto-loading of modules that
> provide the node. This requires to use a statically allocated minor
> number for misc character devices.
> 
> However, rfkill uses dynamic minor numbers and prevents auto-loading
> of the module. So allocate the next static misc minor number and use
> it for rfkill.

As rfkill has been around for a long time, what new use case is needing
to auto-load this based on a major number?

thanks,

greg k-h