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Commit f44e6a30 authored by Johnson CH Chen (陳昭勳)'s avatar Johnson CH Chen (陳昭勳) Committed by Greg Kroah-Hartman
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gpio: mpc8xxx: Add platform device to gpiochip->parent 



[ Upstream commit 322f6a3182d42df18059a89c53b09d33919f755e ]

Dear Linus Walleij,

In old kernels, some APIs still try to use parent->of_node from struct gpio_chip,
and it could be resulted in kernel panic because parent is NULL. Adding platform
device to gpiochip->parent can fix this problem.

Signed-off-by: default avatarJohnson Chen <johnsonch.chen@moxa.com>
Link: https://patchwork.kernel.org/patch/11234609
Link: https://lore.kernel.org/r/HK0PR01MB3521489269F76467DFD7843FFA450@HK0PR01MB3521.apcprd01.prod.exchangelabs.com


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 70a086b5

drivers/gpio/gpio-mpc8xxx.c

+1 −0
Original line number Diff line number Diff line
@@ -346,6 +346,7 @@ static int mpc8xxx_probe(struct platform_device *pdev) 
		return -ENOMEM;



	gc = &mpc8xxx_gc->gc;

	gc->parent = &pdev->dev;



	if (of_property_read_bool(np, "little-endian")) {

		ret = bgpio_init(gc, &pdev->dev, 4,