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To avoid races between iavf_init_task(), iavf_reset_task(), iavf_watchdog_task(), iavf_adminq_task() as well as the shutdown and remove functions more locking is required. The current protection by __IAVF_IN_CRITICAL_TASK is needed in additional places. - The reset task performs state transitions, therefore needs locking. - The adminq task acts on replies from the PF in iavf_virtchnl_completion() which may alter the states. - The init task is not only run during probe but also if a VF gets stuck to reinitialize it. - The shutdown function performs a state transition. - The remove function performs a state transition and also free's resources. iavf_lock_timeout() is introduced to avoid waiting infinitely and cause a deadlock. Rather unlock and print a warning. Signed-off-by: Stefan Assmann <sassmann@kpanic.de> Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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.