gpio: bd72720: handle missing regmap

Currently the probe does not check whether getting the regmap succeeded.
This can cause crash when regmap is used, if it wasn't successfully
obtained. Failing to get the regmap is unlikely, especially since this
driver is expected to be kicked by the MFD driver only after registering
the regmap - but it is still better to handle this gracefully.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Fixes: e7eef0bd4075 ("regulator: bd71828-regulator.c: Fix LDON-HEAD mode")
Link: https://patch.msgid.link/5bfffee380863bcf24f3062e48094c8eb7b1342f.1775565381.git.mazziesaccount@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

diff --git a/drivers/gpio/gpio-bd72720.c b/drivers/gpio/gpio-bd72720.c
index 6549dbf..d0f936e 100644 (file)
--- a/drivers/gpio/gpio-bd72720.c
+++ b/drivers/gpio/gpio-bd72720.c
@@ -256,6 +256,8 @@ static int gpo_bd72720_probe(struct platform_device *pdev)
        g->dev = dev;
        g->chip.parent = parent;
        g->regmap = dev_get_regmap(parent, NULL);
+       if (!g->regmap)
+               return -ENODEV;
 
        return devm_gpiochip_add_data(dev, &g->chip, g);
 }