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DENG Qingfang 718e97c5c8 ramips: mt7530 swconfig: fix race condition in register access 
[ Upstream commit f99c9cd9c4 ]

The mt7530_{r,w}32 operation over MDIO uses 3 mdiobus operations and
does not hold a lock, which causes a race condition when multiple
threads try to access a register, they may get unexpected results.

To avoid this, handle the MDIO lock manually, and use the unlocked
__mdiobus_{read,write} in the critical section.

This fixes the "Ghost VLAN" artifact[1] in MT7530/7621 when the VLAN
operation and the swconfig LED link status poll race between each other.

[1] https://forum.openwrt.org/t/mysterious-vlan-ids-on-mt7621-device/64495

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
(cherry picked from commit f99c9cd9c4)
2021-05-02 14:43:09 +02:00
.github build: Update README & github help 2018-07-08 09:41:53 +01:00
config toolchain: kernel-headers: kernel Git tree mirror hash 2020-12-05 20:50:19 +01:00
include kernel: bump 4.14 to 4.14.231 2021-04-30 10:56:39 +02:00
package ppp/pppoe-discovery: fix -W option 2021-05-02 14:43:09 +02:00
scripts scripts: bundle-libraries.sh: fix broken SDK compiler 2021-03-20 13:44:44 +01:00
target ramips: mt7530 swconfig: fix race condition in register access 2021-05-02 14:43:09 +02:00
toolchain glibc: update to latest 2.27 commit 2021-01-01 14:31:49 +01:00
tools tools: always create $STAGING_DIR/usr/{include,lib} 2020-12-06 08:31:03 +01:00
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 2012-05-08 13:30:49 +00:00
.gitignore gitignore: ignore patches in OpenWrt root directory 2019-11-06 13:12:54 +01:00
BSDmakefile add missing copyright header 2007-02-26 01:05:09 +00:00
Config.in merge: base: update base-files and basic config 2017-12-08 19:41:18 +01:00
feeds.conf.default OpenWrt v19.07.7: revert to branch defaults 2021-02-16 23:30:33 +01:00
LICENSE finally move buildroot-ng to trunk 2016-03-20 17:29:15 +01:00
Makefile build: refactor JSON info files to profiles.json 2020-06-30 22:12:58 +02:00
README build: README punctuation pendantry 2018-07-08 12:05:16 +01:00
rules.mk cmake.mk,rules.mk: fix host builds using CMake and ccache 2020-12-05 20:50:19 +01:00

README 

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------

This is the buildsystem for the OpenWrt Linux distribution.

To build your own firmware you need a Linux, BSD or MacOSX system (case
sensitive filesystem required). Cygwin is unsupported because of the lack
of a case sensitive file system.

You need gcc, binutils, bzip2, flex, python, perl, make, find, grep, diff,
unzip, gawk, getopt, subversion, libz-dev and libc headers installed.

1. Run "./scripts/feeds update -a" to obtain all the latest package definitions
defined in feeds.conf / feeds.conf.default

2. Run "./scripts/feeds install -a" to install symlinks for all obtained
packages into package/feeds/

3. Run "make menuconfig" to select your preferred configuration for the
toolchain, target system & firmware packages.

4. Run "make" to build your firmware. This will download all sources, build
the cross-compile toolchain and then cross-compile the Linux kernel & all
chosen applications for your target system.

Sunshine!
	Your OpenWrt Community
	http://www.openwrt.org