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Filename Latest commit message Latest commit date
Dylan Hung 57c7d46e8b mdio: aspeed: Fix "Link is Down" issue
commit 9dbe33cf371bd70330858370bdbc35c7668f00c3 upstream.

The issue happened randomly in runtime.  The message "Link is Down" is
popped but soon it recovered to "Link is Up".

The "Link is Down" results from the incorrect read data for reading the
PHY register via MDIO bus.  The correct sequence for reading the data
shall be:
1. fire the command
2. wait for command done (this step was missing)
3. wait for data idle
4. read data from data register

Cc: stable@vger.kernel.org
Fixes: f160e99462 ("net: phy: Add mdio-aspeed")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Dylan Hung <dylan_hung@aspeedtech.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20211125024432.15809-1-dylan_hung@aspeedtech.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-01 09:23:29 +01:00
arch KVM: PPC: Book3S HV: Prevent POWER7/8 TLB flush flushing SLB 2021-12-01 09:23:28 +01:00
block
certs
crypto
Documentation
drivers mdio: aspeed: Fix "Link is Down" issue 2021-12-01 09:23:29 +01:00
fs
include ALSA: hda: hdac_ext_stream: fix potential locking issues 2021-11-26 10:47:23 +01:00
init
ipc
kernel tracing: Fix pid filtering when triggers are attached 2021-12-01 09:23:29 +01:00
lib
LICENSES
mm hugetlbfs: flush TLBs correctly after huge_pmd_unshare 2021-11-26 10:47:23 +01:00
net net: nexthop: fix null pointer dereference when IPv6 is not enabled 2021-12-01 09:23:27 +01:00
samples
scripts
security
sound ALSA: ctxfi: Fix out-of-range access 2021-12-01 09:23:28 +01:00
tools
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
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MAINTAINERS
Makefile Linux 5.4.162 2021-11-26 10:47:23 +01:00
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.

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.