pinctrl: sunxi: make use of raw_spinlock variants
authorJulia Cartwright <julia@ni.com>
Thu, 9 Mar 2017 16:22:06 +0000 (10:22 -0600)
committerLinus Walleij <linus.walleij@linaro.org>
Thu, 16 Mar 2017 15:39:16 +0000 (16:39 +0100)
commitf658ed3642cd1872c536c820597b85a9da2ddded
tree0e82f0356fdd49411d984cf092fd36c5062b3d64
parent82e529c1c7befe82fc7fc258b956e973056c20bb
pinctrl: sunxi: make use of raw_spinlock variants

The sunxi pinctrl driver currently implement 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>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
drivers/pinctrl/sunxi/pinctrl-sunxi.c
drivers/pinctrl/sunxi/pinctrl-sunxi.h