linux-kernel - RE: [PATCH] r8152: Add support for setting MAC to system's Auxiliary MAC address

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Date:	Wed, 1 Jun 2016 22:31:52 +0000
From:	<Mario_Limonciello@...l.com>
To:	<andrew@...n.ch>
CC:	<hayeswang@...ltek.com>, <linux-kernel@...r.kernel.org>,
	<netdev@...r.kernel.org>, <linux-usb@...r.kernel.org>,
	<pali.rohar@...il.com>, <anthony.wong@...onical.com>
Subject: RE: [PATCH] r8152: Add support for setting MAC to system's Auxiliary
 MAC address

> -----Original Message-----
> From: Andrew Lunn [mailto:andrew@...n.ch]
> Sent: Wednesday, June 1, 2016 5:27 PM
> To: Limonciello, Mario <Mario_Limonciello@...l.com>
> Cc: hayeswang@...ltek.com; LKML <linux-kernel@...r.kernel.org>; Netdev
> <netdev@...r.kernel.org>; Linux USB <linux-usb@...r.kernel.org>;
> pali.rohar@...il.com; anthony.wong@...onical.com
> Subject: Re: [PATCH] r8152: Add support for setting MAC to system's
> Auxiliary MAC address
> 
> On Wed, Jun 01, 2016 at 04:50:44PM -0500, Mario Limonciello wrote:
> > Dell systems with Type-C ports have support for a persistent system
> > specific MAC address when used with Dell Type-C docks and dongles.
> > This means a dock plugged into two different systems will show
> > different (but persistent) MAC addresses.  Dell Type-C docks and
> > dongles use the
> > r8152 driver.
> >
> > This information for the system's persistent MAC address is burned in
> > when the HW is built and avilable under _SB\AMAC in the DSDT at runtime.
> >
> > More information about the technology is available here:
> > http://www.dell.com/support/article/us/en/04/SLN301147
> >
> > Signed-off-by: Mario Limonciello <mario_limonciello@...l.com>
> > ---
> >  drivers/net/usb/Kconfig |  1 +
> >  drivers/net/usb/r8152.c | 37
> +++++++++++++++++++++++++++++++++++++
> >  2 files changed, 38 insertions(+)
> >
> > diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig index
> > cdde590..c320930 100644
> > --- a/drivers/net/usb/Kconfig
> > +++ b/drivers/net/usb/Kconfig
> > @@ -98,6 +98,7 @@ config USB_RTL8150
> >  config USB_RTL8152
> >  	tristate "Realtek RTL8152/RTL8153 Based USB Ethernet Adapters"
> >  	select MII
> > +	depends on ACPI
> 
> Hi Mario
> 
> That seems a bit heavy handed. What about ARM or MIPS machines which
> don't use ACPI but do have USB ports where i could plug in a USB dongle with
> this chipset.
> 
> I think it would be better to make use of ACPI if it is available, but don't
> require it in order the build the driver.
> 
>       Andrew

Hi Andrew,

Thanks for that feedback.  I'll adjust that to look for CONFIG_ACPI in the code instead in V2 after I get some additional comments for the implementation.

Thanks,