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If an error occurs during mv88e6xxx_setup() and the PTP clock has been registered, the clock will not be unregistered as mv88e6xxx_ptp_free() will not be called. mv88e6xxx_hwtstamp_free() also is not called. As mv88e6xxx_ptp_free() can cope with being called without a successful call to mv88e6xxx_ptp_setup(), and mv88e6xxx_hwtstamp_free() is empty, add both these *_free() calls to the error cleanup paths in mv88e6xxx_setup(). Moreover, mv88e6xxx_teardown() should teardown setup done in mv88e6xxx_setup() - see dsa_switch_setup(). However, instead *_free() are called from mv88e6xxx_remove() function that is only called when a device is unbound, which omits cleanup should a failure occur later in dsa_switch_setup(). Move the *_free() calls from mv88e6xxx_remove() to mv88e6xxx_teardown(). Note that mv88e6xxx_ptp_setup() must be called holding the reg_lock, but mv88e6xxx_ptp_free() must never be. This is especially true after commit "ptp: rework ptp_clock_unregister() to disable events". This patch does not change this, but adds a comment to that effect. Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Link: https://patch.msgid.link/E1uy84w-00000005Spi-46iF@rmk-PC.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.