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On setups without interrupts, the interrupt handler is called from a timer callback. For non-peripheral receives napi is scheduled, interrupts are disabled and the timer is canceled with a blocking call. In case of an error this can happen as well. Check if napi is scheduled in the timer callback after the interrupt handler executed. If napi is scheduled, the timer is disabled. It will be reenabled by m_can_poll(). Return error values from the interrupt handler so that interrupt threads and timer callback can deal differently with it. In case of the timer we only disable the timer. The rest will be done when stopping the interface. Fixes: |
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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.