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pinctrl: sx150x: handle failure case of devm_kstrdup

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devm_kstrdup() may return NULL if internal allocation failed.
Thus using  label, name  is unsafe without checking. Therefor
in the unlikely case of allocation failure, sx150x_probe() simply
returns -ENOMEM.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: 9e80f9064e ("pinctrl: Add SX150X GPIO Extender Pinctrl Driver")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Nicholas Mc Guire 2018-12-02 11:04:17 +01:00 committed by Linus Walleij
parent 0819dc72ea
commit a9d9f6b83f
1 changed files with 8 additions and 3 deletions
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11
drivers/pinctrl/pinctrl-sx150x.c
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@ -1166,7 +1166,6 @@ static int sx150x_probe(struct i2c_client *client,
}
/* Register GPIO controller */
pctl->gpio.label = devm_kstrdup(dev, client->name, GFP_KERNEL);
pctl->gpio.base = -1;
pctl->gpio.ngpio = pctl->data->npins;
pctl->gpio.get_direction = sx150x_gpio_get_direction;
@ -1180,6 +1179,10 @@ static int sx150x_probe(struct i2c_client *client,
pctl->gpio.of_node = dev->of_node;
#endif
pctl->gpio.can_sleep = true;
pctl->gpio.label = devm_kstrdup(dev, client->name, GFP_KERNEL);
if (!pctl->gpio.label)
return -ENOMEM;
/*
* Setting multiple pins is not safe when all pins are not
* handled by the same regmap register. The oscio pin (present
@ -1200,13 +1203,15 @@ static int sx150x_probe(struct i2c_client *client,
/* Add Interrupt support if an irq is specified */
if (client->irq > 0) {
pctl->irq_chip.name = devm_kstrdup(dev, client->name,
GFP_KERNEL);
pctl->irq_chip.irq_mask = sx150x_irq_mask;
pctl->irq_chip.irq_unmask = sx150x_irq_unmask;
pctl->irq_chip.irq_set_type = sx150x_irq_set_type;
pctl->irq_chip.irq_bus_lock = sx150x_irq_bus_lock;
pctl->irq_chip.irq_bus_sync_unlock = sx150x_irq_bus_sync_unlock;
pctl->irq_chip.name = devm_kstrdup(dev, client->name,
GFP_KERNEL);
if (!pctl->irq_chip.name)
return -ENOMEM;
pctl->irq.masked = ~0;
pctl->irq.sense = 0;