diff options
| author | Johnson CH Chen (陳昭勳) <JohnsonCH.Chen@moxa.com> | 2019-11-26 06:51:11 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-23 08:19:37 +0100 |
| commit | 19f326178dce03ad7b3e308db5a59037d7c3c2ba (patch) | |
| tree | bb41d448f612ba5cfd11cbdfef41ab21dca9f196 /drivers/gpio | |
| parent | a4e032e1dc3fb8cc608ee6d90c79fa9a5bcc4d5a (diff) | |
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 <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: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-mpc8xxx.c | 1 |
1 files changed, 1 insertions, 0 deletions
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, |