Bartosz Golaszewski ba3f1a346b gpiolib: provide gpio_device_find() ...

[ Upstream commit cfe102f633 ]

gpiochip_find() is wrong and its kernel doc is misleading as the
function doesn't return a reference to the gpio_chip but just a raw
pointer. The chip itself is not guaranteed to stay alive, in fact it can
be deleted at any point. Also: other than GPIO drivers themselves,
nobody else has any business accessing gpio_chip structs.

Provide a new gpio_device_find() function that returns a real reference
to the opaque gpio_device structure that is guaranteed to stay alive for
as long as there are active users of it.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Stable-dep-of: 48e1b4d369 ("gpiolib: remove the GPIO device from the list when it's unregistered")
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-01-25 15:35:39 -08:00

..

aspeed.h

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consumer.h

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driver.h

gpiolib: provide gpio_device_find()

2024-01-25 15:35:39 -08:00

gpio-reg.h

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legacy-of-mm-gpiochip.h

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machine.h

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property.h

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regmap.h

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