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Russell King 0f239ea029 net: dsa: fix unintended change of bridge interface STP state 
[ Upstream commit 9c2054a5cf ]

When a DSA port is added to a bridge and brought up, the resulting STP
state programmed into the hardware depends on the order that these
operations are performed.  However, the Linux bridge code believes that
the port is in disabled mode.

If the DSA port is first added to a bridge and then brought up, it will
be in blocking mode.  If it is brought up and then added to the bridge,
it will be in disabled mode.

This difference is caused by DSA always setting the STP mode in
dsa_port_enable() whether or not this port is part of a bridge.  Since
bridge always sets the STP state when the port is added, brought up or
taken down, it is unnecessary for us to manipulate the STP state.

Apparently, this code was copied from Rocker, and the very next day a
similar fix for Rocker was merged but was not propagated to DSA.  See
e47172ab7e ("rocker: put port in FORWADING state after leaving bridge")

Fixes: b73adef677 ("net: dsa: integrate with SWITCHDEV for HW bridging")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-27 14:50:26 +01:00
arch KVM: PPC: Release all hardware TCE tables attached to a group 2020-01-27 14:50:24 +01:00
block block: don't use bio->bi_vcnt to figure out segment number 2020-01-27 14:50:23 +01:00
certs
crypto crypto: tgr192 - fix unaligned memory access 2020-01-27 14:50:13 +01:00
Documentation bus: ti-sysc: Add mcasp optional clocks flag 2020-01-27 14:50:02 +01:00
drivers driver core: Fix PM-runtime for links added during consumer probe 2020-01-27 14:50:26 +01:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:21:29 +01:00
fs exportfs: fix 'passing zero to ERR_PTR()' warning 2020-01-27 14:50:02 +01:00
include driver core: Fix PM-runtime for links added during consumer probe 2020-01-27 14:50:26 +01:00
init fork: fix some -Wmissing-prototypes warnings 2019-12-05 09:21:04 +01:00
ipc
kernel fork, memcg: fix cached_stacks case 2020-01-27 14:50:11 +01:00
lib idr: Fix idr_get_next_ul race with idr_remove 2019-12-17 20:36:02 +01:00
LICENSES
mm mm/huge_memory.c: thp: fix conflict of above-47bit hint address and PMD alignment 2020-01-23 08:21:32 +01:00
net net: dsa: fix unintended change of bridge interface STP state 2020-01-27 14:50:26 +01:00
samples samples: bpf: fix syscall_tp due to unused syscall 2020-01-12 12:17:13 +01:00
scripts kconfig: don't crash on NULL expressions in expr_eq() 2020-01-12 12:17:19 +01:00
security keys: Timestamp new keys 2020-01-27 14:50:23 +01:00
sound ASoC: qcom: Fix of-node refcount unbalance in apq8016_sbc_parse_of() 2020-01-27 14:50:26 +01:00
tools perf map: No need to adjust the long name of modules 2020-01-27 14:49:53 +01:00
usr
virt KVM: arm/arm64: vgic: Don't rely on the wrong pending table 2019-12-13 08:52:45 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile kbuild: mark prepare0 as PHONY to fix external module build 2020-01-27 14:50:13 +01:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.