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Andrew Lunn says: ==================== Ethernet Cable test support any copper Ethernet PHY have support for performing diagnostics of the cable. Are the cable shorted, broken, not plugged into anything at the other end? And they can report roughly how far along the cable any fault is. Add infrastructure in ethtool and phylib support for triggering a cable test and reporting the results. The Marvell 1G PHY driver is then extended to make use of this infrastructure. For testing, a modified ethtool(1) can be found here: https://github.com/lunn/ethtool.git feature/cable-test-v4. This also contains extra code for TDR dump, which will be added to the kernel in a later patch series. Thanks to Chris Healy for extensive testing. v2: See individual patches but: Remove _REPLY messages Change length into a u32 Grammar fixes Rename functions for consistency Extack for cable test already running Remove ethnl_cable_test_act_ops Add status attributes Rename pairs from numbers to letters v3: See individual patches but: Remove ETHTOOL_MSG_CABLE_TEST_ACT_REPLY from documentation Remove unused cable_test_get_policy Fixed example in document Add ETHTOOL_A_CABLE_NEST_* enum Add ETHTOOL_MSG_CABLE_TEST_NTF to documentation Poison phydev->skb Return -EMSGSIZE when ethnl_bcastmsg_put() fails Return valid error code when nla_nest_start() fails Use u8 for results Actually put u32 length into message s/mavell/marvell/g Remove include of <uapi/linux/ethtool_netlink.h> EMSGSIZE when ethnl_bcastmsg_put() fails Print an error message on failure, since this is a void function. v4: See individual patches but: Remove unwanted blank line ENOTSUPP->EOPNOTSUPP Move EINVAL->EMSGSIZE fix to correct patch ==================== Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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.