linux-kernel - Re: [PATCH v2] Bluetooth: allocate static minor for vhci

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Date:	Tue, 18 Feb 2014 09:49:41 -0800
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Lucas De Marchi <lucas.de.marchi@...il.com>,
	"bluez mailin list (linux-bluetooth@...r.kernel.org)" 
	<linux-bluetooth@...r.kernel.org>,
	Kay Sievers <kay.sievers@...y.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Lucas De Marchi <lucas.demarchi@...el.com>
Subject: Re: [PATCH v2] Bluetooth: allocate static minor for vhci

Hi Lucas,

>>> Commit bfacbb9 (Bluetooth: Use devname:vhci module alias for virtual HCI
>>> driver) added the module alias to hci_vhci module so it's possible to
>>> create the /dev/vhci node. However creating an alias without
>>> specifying the minor doesn't allow us to create the node ahead,
>>> triggerring module auto-load when it's first accessed.
>>> 
>>> Starting with depmod from kmod 16 we started to warn if there's a
>>> devname alias without specifying the major and minor.
>>> 
>>> Let's do the same done for uhid, kvm, fuse and others, specifying a
>>> fixed minor. In systems with systemd as the init the following will
>>> happen: on early boot systemd will call "kmod static-nodes" to read
>>> /lib/modules/$(uname -r)/modules.devname and then create the nodes. When
>>> first accessed these "dead" nodes will trigger the module loading.
>>> 
>>> Signed-off-by: Lucas De Marchi <lucas.demarchi@...el.com>
>>> ---
>>> 
>>> Changes from v1:
>>> - use minor=137, since 240 is reserved for local use
>>> 
>>> We talked about using 197, but that's being used by pxa3xx-gcu, too.
>> 
>> looks fine to me. If Kay and/or Greg want to ack it, then I take it through bluetooth-next tree.
> 
> Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 

patch has been applied to bluetooth-next tree.

Regards

Marcel

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