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gpio: pcf857x: fixup smatch WARNING 

6e20a0a429
(gpio: pcf857x: enable gpio_to_irq() support)
added new smatch warnings

drivers/gpio/gpio-pcf857x.c:288 pcf857x_probe() error: we previously \
	assumed 'pdata' could be null (see line 277)
drivers/gpio/gpio-pcf857x.c:364 pcf857x_probe() warn: variable dereferenced\
	 before check 'pdata' (see line 292)
drivers/gpio/gpio-pcf857x.c:421 pcf857x_remove() error: we previously\
	 assumed 'pdata' could be null (see line 410)

This patch fixes it

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Kuninori Morimoto 2012-09-11 22:19:47 -07:00 committed by Linus Walleij
parent 20bc4d5d56
commit 3c0528810c
1 changed files with 3 additions and 3 deletions
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6
drivers/gpio/gpio-pcf857x.c
View File

@ -285,7 +285,7 @@ static int pcf857x_probe(struct i2c_client *client,
gpio->chip.ngpio = id->driver_data;
/* enable gpio_to_irq() if platform has settings */
if (pdata->irq) {
if (pdata && pdata->irq) {
status = pcf857x_irq_domain_init(gpio, pdata, &client->dev);
if (status < 0) {
dev_err(&client->dev, "irq_domain init failed\n");
@ -394,7 +394,7 @@ fail:
dev_dbg(&client->dev, "probe error %d for '%s'\n",
status, client->name);
if (pdata->irq)
if (pdata && pdata->irq)
pcf857x_irq_domain_cleanup(gpio);
kfree(gpio);
@ -418,7 +418,7 @@ static int pcf857x_remove(struct i2c_client *client)
}
}
if (pdata->irq)
if (pdata && pdata->irq)
pcf857x_irq_domain_cleanup(gpio);
status = gpiochip_remove(&gpio->chip);