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| author | Julia Cartwright <julia@ni.com> | 2017-03-09 10:21:52 -0600 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-03-16 21:52:07 +0100 |
| commit | 45897809d518c7a84b215c79b58e4add9b8a1d40 (patch) | |
| tree | 47864b85940f23127c9b846978f0c538bae82783 /drivers/gpio/gpio-bcm-kona.c | |
| parent | 21d01c9c081ab231d6ef9d94ad9345c58b6568c1 (diff) | |
| download | talos-obmc-linux-45897809d518c7a84b215c79b58e4add9b8a1d40.tar.gz talos-obmc-linux-45897809d518c7a84b215c79b58e4add9b8a1d40.zip | |
gpio: 104-dio-48e: make use of raw_spinlock variants
The 104-dio-48e 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-bcm-kona.c')
0 files changed, 0 insertions, 0 deletions
