tree e76970c32b86f621a9a2bbd53ba8369e261ca7c4
parent 3906e8089af3225a0a22c12cc3cf10be4630976e
author Julia Cartwright <julia@ni.com> 1490136189 -0500
committer Linus Walleij <linus.walleij@linaro.org> 1490692439 +0200

gpio: pci-idio-16: make use of raw_spinlock variants

The pci-idio-16 gpio driver currently implements an irq_chip for handling
interrupts; due to how irq_chip handling is done, it's necessary for the
irq_chip methods to be invoked from hardirq context, even on a a
real-time kernel.  Because the spinlock_t type becomes a "sleeping"
spinlock w/ RT kernels, it is not suitable to be used with irq_chips.

A quick audit of the operations under the lock reveal that they do only
minimal, bounded work, and are therefore safe to do under a raw spinlock.

Signed-off-by: Julia Cartwright <julia@ni.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>