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853a603030
RZ/G2L interrupt chips require that the interrupt is masked before changing
the NMI, IRQ, TINT interrupt settings. Aside of that, after setting an edge
trigger type it is required to clear the interrupt status register in order
to avoid spurious interrupts.
The current implementation fails to do either of that and therefore is
prone to generate spurious interrupts when setting the trigger type.
Address this by:
- Ensuring that the interrupt is masked at the chip level across the
update for the TINT chip
- Clearing the interrupt status register after updating the trigger mode
for edge type interrupts
[ tglx: Massaged changelog and reverted the spin_lock_irqsave() change as
the set_type() callback is always called with interrupts disabled. ]
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 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.