mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
gpio/mxs: use devm_* helpers to make error handling simple
It uses devm_* helpers to make the error handling of probe clean and simple. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
parent
84f3570a96
commit
940a4f7b51
1 changed files with 13 additions and 39 deletions
|
@ -186,44 +186,29 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev)
|
|||
struct resource *iores = NULL;
|
||||
int err;
|
||||
|
||||
port = kzalloc(sizeof(struct mxs_gpio_port), GFP_KERNEL);
|
||||
port = devm_kzalloc(&pdev->dev, sizeof(*port), GFP_KERNEL);
|
||||
if (!port)
|
||||
return -ENOMEM;
|
||||
|
||||
port->id = pdev->id;
|
||||
port->virtual_irq_start = MXS_GPIO_IRQ_START + port->id * 32;
|
||||
|
||||
port->irq = platform_get_irq(pdev, 0);
|
||||
if (port->irq < 0)
|
||||
return port->irq;
|
||||
|
||||
/*
|
||||
* map memory region only once, as all the gpio ports
|
||||
* share the same one
|
||||
*/
|
||||
if (!base) {
|
||||
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!iores) {
|
||||
err = -ENODEV;
|
||||
goto out_kfree;
|
||||
}
|
||||
|
||||
if (!request_mem_region(iores->start, resource_size(iores),
|
||||
pdev->name)) {
|
||||
err = -EBUSY;
|
||||
goto out_kfree;
|
||||
}
|
||||
|
||||
base = ioremap(iores->start, resource_size(iores));
|
||||
if (!base) {
|
||||
err = -ENOMEM;
|
||||
goto out_release_mem;
|
||||
}
|
||||
base = devm_request_and_ioremap(&pdev->dev, iores);
|
||||
if (!base)
|
||||
return -EADDRNOTAVAIL;
|
||||
}
|
||||
port->base = base;
|
||||
|
||||
port->irq = platform_get_irq(pdev, 0);
|
||||
if (port->irq < 0) {
|
||||
err = -EINVAL;
|
||||
goto out_iounmap;
|
||||
}
|
||||
|
||||
/*
|
||||
* select the pin interrupt functionality but initially
|
||||
* disable the interrupts
|
||||
|
@ -246,29 +231,18 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev)
|
|||
port->base + PINCTRL_DOUT(port->id), NULL,
|
||||
port->base + PINCTRL_DOE(port->id), NULL, false);
|
||||
if (err)
|
||||
goto out_iounmap;
|
||||
return err;
|
||||
|
||||
port->bgc.gc.to_irq = mxs_gpio_to_irq;
|
||||
port->bgc.gc.base = port->id * 32;
|
||||
|
||||
err = gpiochip_add(&port->bgc.gc);
|
||||
if (err)
|
||||
goto out_bgpio_remove;
|
||||
if (err) {
|
||||
bgpio_remove(&port->bgc);
|
||||
return err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
out_bgpio_remove:
|
||||
bgpio_remove(&port->bgc);
|
||||
out_iounmap:
|
||||
if (iores)
|
||||
iounmap(port->base);
|
||||
out_release_mem:
|
||||
if (iores)
|
||||
release_mem_region(iores->start, resource_size(iores));
|
||||
out_kfree:
|
||||
kfree(port);
|
||||
dev_info(&pdev->dev, "%s failed with errno %d\n", __func__, err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct platform_driver mxs_gpio_driver = {
|
||||
|
|
Loading…
Reference in a new issue