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5eca831742
- Drop the lock before reading out the GPIO direction
setting in drivers supporting the .get_direction()
callback: some of them may be slowpath.
- Flush GPIO direction setting before locking a GPIO as an
IRQ: some electronics or other poking around in the
registers behind our back may have happened, so flush
the direction status before trying to lock the line for
use by IRQs.
- Bail out silently when asked to perform operations on
NULL GPIO descriptors. That is what all the get_*_optional()
is about: we get optional GPIO handles, if they are not
there, we get NULL.
- Handle compatible ioctl() correctly: we need to convert
the ioctl() pointer using compat_ptr() here like everyone
else.
- Disable the broken .to_irq() on the LPC32xx platform.
The whole irqchip infrastructure was replaced in the
last merge window, and a new implementation will be
needed.
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Merge tag 'gpio-v4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"A bunch of GPIO fixes for the v4.7 series:
- Drop the lock before reading out the GPIO direction setting in
drivers supporting the .get_direction() callback: some of them may
be slowpath.
- Flush GPIO direction setting before locking a GPIO as an IRQ: some
electronics or other poking around in the registers behind our back
may have happened, so flush the direction status before trying to
lock the line for use by IRQs.
- Bail out silently when asked to perform operations on NULL GPIO
descriptors. That is what all the get_*_optional() is about: we
get optional GPIO handles, if they are not there, we get NULL.
- Handle compatible ioctl() correctly: we need to convert the ioctl()
pointer using compat_ptr() here like everyone else.
- Disable the broken .to_irq() on the LPC32xx platform. The whole
irqchip infrastructure was replaced in the last merge window, and a
new implementation will be needed"
* tag 'gpio-v4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: drop lock before reading GPIO direction
gpio: bail out silently on NULL descriptors
gpio: handle compatible ioctl() pointers
gpio: flush direction status in gpiochip_lock_as_irq()
gpio: lpc32xx: disable broken to_irq support
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