linux-kernel - Re: [PATCH v2 1/1] usb: option.c: Fix Cinterion AHxx enumeration.

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Date:	Mon, 25 Jan 2016 13:39:11 +0100
From:	Johan Hovold <johan@...nel.org>
To:	John Ernberg <john.ernberg@...ia.se>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v2 1/1] usb: option.c: Fix Cinterion AHxx enumeration.

On Mon, Jan 25, 2016 at 12:27:17PM +0000, John Ernberg wrote:
> From: John Ernberg <john.ernberg@...ia.se>
> 
> In certain kernel configurations where the cdc_ether and option drivers
> are compiled as modules there can occur a race condition in enumeration.
> This causes the option driver to enumerate the ethernet(wwan) interface
> as usb-serial interfaces.
> 
> usb-devices output for the modem:
> T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  5 Spd=480 MxCh= 0
> D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> P:  Vendor=1e2d ProdID=0055 Rev=00.00
> S:  Manufacturer=Cinterion
> S:  Product=AHx
> C:  #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr=10mA
> I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
> I:  If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
> I:  If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
> I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
> I:  If#= 4 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
> I:  If#= 5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
> 
> Signed-off-by: John Ernberg <john.ernberg@...ia.se>

Now applied, thanks.

Johan