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Russell King says: ==================== net: stmmac: timestamping/ptp cleanups This series cleans up the hardware timestamping / PTP initialisation and cleanup code in the stmmac driver. Several key points in no particular order: 1. Golden rule: unregister first, then release resources. stmmac_release_ptp didn't do this. 2. Avoid leaking resources - __stmmac_open() failure leaves the timestamping support initialised, but stops its clock. Also violates (1). 3. Avoid double-release of resources - stmmac_open() followed by stmmac_xdp_open() failing results in the PTP clock prepare and enable counts being released, and if the interface is then brought down, they are incorrectly released again. As XDP doesn't gain any additional prepare/enables on the PTP clock, remove this incorrect cleanup. 4. Changing the MTU of the interface is disruptive to PTP, and remains so as long as. This is not fixed by this series (too invasive at the moment.) 5. Avoid exporting functions that aren't used... 6. Avoid unnecessary runtime PM state manipulations (no point manipulating this when MTU changes). 7. Make the PTP/timestamping initialisation more readable - no point calling functions in the same file from one callsite that return error codes from one location in the called function, to only have the sole callee print messages depending on that return code. Also simplifying the mess in stmmac_hw_setup(). Also placing support checks in a better location. Also getting rid of the "ptp_register" boolean through this restructuring. v1 was tested by Gatien CHEVALLIER - thanks. ==================== Link: https://patch.msgid.link/aMKtV6O0WqlmJFN4@shell.armlinux.org.uk Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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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 reStructuredText 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.