diff options
| author | Julia Cartwright <julia@ni.com> | 2017-03-21 23:43:09 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-03-28 11:13:59 +0200 |
| commit | ea38ce081d155534494bac5df2bb0d343fb1679b (patch) | |
| tree | e76970c32b86f621a9a2bbd53ba8369e261ca7c4 /drivers/gpio/gpio-104-idi-48.c | |
| parent | gpio: 104-idio-16: make use of raw_spinlock variants (diff) | |
| download | linux-ea38ce081d155534494bac5df2bb0d343fb1679b.tar.xz linux-ea38ce081d155534494bac5df2bb0d343fb1679b.zip | |
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>
Diffstat (limited to 'drivers/gpio/gpio-104-idi-48.c')
0 files changed, 0 insertions, 0 deletions