From 1c055e55a242a33e574e48be530e06770a210dcd Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 19 Feb 2024 03:26:26 +0000
Subject: [PATCH] add r8169 read mac form eeprom

---
 kernel/Documentation/ABI/testing/sysfs-bus-css |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/kernel/Documentation/ABI/testing/sysfs-bus-css b/kernel/Documentation/ABI/testing/sysfs-bus-css
index 2979c40..12a733f 100644
--- a/kernel/Documentation/ABI/testing/sysfs-bus-css
+++ b/kernel/Documentation/ABI/testing/sysfs-bus-css
@@ -20,6 +20,7 @@
 Description:	Contains the ids of the channel paths used by this
 		subchannel, as reported by the channel subsystem
 		during subchannel recognition.
+
 		Note: This is an I/O-subchannel specific attribute.
 Users:		s390-tools, HAL
 
@@ -31,5 +32,30 @@
 		channel subsystem when last queried by the common I/O
 		layer (this implies that this attribute is not necessarily
 		in sync with the values current in the channel subsystem).
+
 		Note: This is an I/O-subchannel specific attribute.
 Users:		s390-tools, HAL
+
+What:		/sys/bus/css/devices/.../driver_override
+Date:		June 2019
+Contact:	Cornelia Huck <cohuck@redhat.com>
+		linux-s390@vger.kernel.org
+Description:	This file allows the driver for a device to be specified. When
+		specified, only a driver with a name matching the value written
+		to driver_override will have an opportunity to bind to the
+		device. The override is specified by writing a string to the
+		driver_override file (echo vfio-ccw > driver_override) and
+		may be cleared with an empty string (echo > driver_override).
+		This returns the device to standard matching rules binding.
+		Writing to driver_override does not automatically unbind the
+		device from its current driver or make any attempt to
+		automatically load the specified driver.  If no driver with a
+		matching name is currently loaded in the kernel, the device
+		will not bind to any driver.  This also allows devices to
+		opt-out of driver binding using a driver_override name such as
+		"none".  Only a single driver may be specified in the override,
+		there is no support for parsing delimiters.
+
+		Note that unlike the mechanism of the same name for pci, this
+		file does not allow to override basic matching rules. I.e.,
+		the driver must still match the subchannel type of the device.

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