From: Johnson CH Chen (陳昭勳) Date: Tue, 26 Nov 2019 06:51:11 +0000 (+0000) Subject: gpio: mpc8xxx: Add platform device to gpiochip->parent X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=19f326178dce03ad7b3e308db5a59037d7c3c2ba;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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: Johnson Chen Link: https://patchwork.kernel.org/patch/11234609 Link: https://lore.kernel.org/r/HK0PR01MB3521489269F76467DFD7843FFA450@HK0PR01MB3521.apcprd01.prod.exchangelabs.com Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin --- diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c index bd777687233b..b67f61d31e25 100644 --- a/drivers/gpio/gpio-mpc8xxx.c +++ b/drivers/gpio/gpio-mpc8xxx.c @@ -306,6 +306,7 @@ 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,