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Russell King says: ==================== mvpp2 phylink fixes Having spent a while debugging issues with Sven Auhagen, it appears that the mvpp2 network driver's phylink support isn't quite correct. This series fixes that up, but, despite being tested locally, by Sven, and by Antoine, I would prefer it to be applied to net-next so that there is time for more people to test before it hits -rc or stable backports. The symptoms were that although PHYs would come up, the GMAC never reported that the link was up, or in some cases it did report link up but packets would not flow. Various approaches were tried to work around that, such as switching to in-band negotiation from PHY mode, but ultimately the problem was in the way mvpp2 was being programmed. This series addresses that by, essentially, making mvpp2 follow the same implementation pattern as mvneta: we configure the GMAC in three stages: 1) the PHY interface mode 2) the negotiation advert 3) the negotiation style Another issue is that mvpp2 was always taking the link down each time its mac_config method was called: this is disruptive when the link is already up, and we're just updating settings such as flow control. There are some circumstances where we make the call despite there being no changes (eg, when phylink is polling a GPIO or using a custom link state function.) This series depends on two previous patches already sent for net-next: net: marvell: mvpp2: fix lack of link interrupts net: marvell: mvpp2: use phy_interface_mode_is_8023z() helper There is one last patch which deals with link status interrupts, which I'll send separately because I think there's other considerations, but that should not hold up this series of patches. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.