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[ecm] Use ACPI-provided system-specific MAC address if present 

Use the "system MAC address" provided within the DSDT/SSDT if such an
address is available and has not already been assigned to a network
device.

Tested-by: Andreas Hammarskjöld <junior@2PintSoftware.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/467/head
Michael Brown 2021-09-08 14:29:36 +01:00
parent 91e147213c
commit 05a76acc6d
1 changed files with 9 additions and 0 deletions
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9
src/drivers/net/ecm.c
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@ -30,6 +30,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/if_ether.h>
#include <ipxe/base16.h>
#include <ipxe/profile.h>
#include <ipxe/acpimac.h>
#include <ipxe/usb.h>
#include "ecm.h"
@ -93,6 +94,14 @@ int ecm_fetch_mac ( struct usb_function *func,
int len;
int rc;
/* Use system-specific MAC address, if present and not already used */
if ( ( ( rc = acpi_mac ( hw_addr ) ) == 0 ) &&
! find_netdev_by_ll_addr ( &ethernet_protocol, hw_addr ) ) {
DBGC ( usb, "USB %s using system-specific MAC %s\n",
func->name, eth_ntoa ( hw_addr ) );
return 0;
}
/* Fetch MAC address string */
len = usb_get_string_descriptor ( usb, desc->mac, 0, buf,
sizeof ( buf ) );