diff options
author | William Breathitt Gray <vilhelm.gray@gmail.com> | 2016-02-03 20:17:02 (GMT) |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2016-02-15 23:19:52 (GMT) |
commit | cb32389cb9b36e4a40ecca5c10e5a80af2e97b07 (patch) | |
tree | 4fecd48c9ab5b63bdc252e54c4102ab2639bfc72 /drivers/gpio/gpio-104-idio-16.c | |
parent | 5cfc05761ba0c7f1aa04f0d441fb68a28453d13b (diff) | |
download | linux-cb32389cb9b36e4a40ecca5c10e5a80af2e97b07.tar.xz |
gpio: 104-idio-16: Use devm_request_region
By the time request_region is called in the ACCES 104-IDIO-16 GPIO
driver, a corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-104-idio-16.c')
-rw-r--r-- | drivers/gpio/gpio-104-idio-16.c | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c index d0f7976..ecc85fe 100644 --- a/drivers/gpio/gpio-104-idio-16.c +++ b/drivers/gpio/gpio-104-idio-16.c @@ -38,7 +38,6 @@ MODULE_PARM_DESC(idio_16_irq, "ACCES 104-IDIO-16 interrupt line number"); * @lock: synchronization lock to prevent I/O race conditions * @irq_mask: I/O bits affected by interrupts * @base: base port address of the GPIO device - * @extent: extent of port address region of the GPIO device * @irq: Interrupt line number * @out_state: output bits state */ @@ -47,7 +46,6 @@ struct idio_16_gpio { spinlock_t lock; unsigned long irq_mask; unsigned base; - unsigned extent; unsigned irq; unsigned out_state; }; @@ -201,11 +199,10 @@ static int __init idio_16_probe(struct platform_device *pdev) if (!idio16gpio) return -ENOMEM; - if (!request_region(base, extent, name)) { - dev_err(dev, "Unable to lock %s port addresses (0x%X-0x%X)\n", - name, base, base + extent); - err = -EBUSY; - goto err_lock_io_port; + if (!devm_request_region(dev, base, extent, name)) { + dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n", + base, base + extent); + return -EBUSY; } idio16gpio->chip.label = name; @@ -219,7 +216,6 @@ static int __init idio_16_probe(struct platform_device *pdev) idio16gpio->chip.get = idio_16_gpio_get; idio16gpio->chip.set = idio_16_gpio_set; idio16gpio->base = base; - idio16gpio->extent = extent; idio16gpio->irq = irq; idio16gpio->out_state = 0xFFFF; @@ -230,7 +226,7 @@ static int __init idio_16_probe(struct platform_device *pdev) err = gpiochip_add_data(&idio16gpio->chip, idio16gpio); if (err) { dev_err(dev, "GPIO registering failed (%d)\n", err); - goto err_gpio_register; + return err; } /* Disable IRQ by default */ @@ -241,23 +237,19 @@ static int __init idio_16_probe(struct platform_device *pdev) handle_edge_irq, IRQ_TYPE_NONE); if (err) { dev_err(dev, "Could not add irqchip (%d)\n", err); - goto err_gpiochip_irqchip_add; + goto err_gpiochip_remove; } err = request_irq(irq, idio_16_irq_handler, 0, name, idio16gpio); if (err) { dev_err(dev, "IRQ handler registering failed (%d)\n", err); - goto err_request_irq; + goto err_gpiochip_remove; } return 0; -err_request_irq: -err_gpiochip_irqchip_add: +err_gpiochip_remove: gpiochip_remove(&idio16gpio->chip); -err_gpio_register: - release_region(base, extent); -err_lock_io_port: return err; } @@ -267,7 +259,6 @@ static int idio_16_remove(struct platform_device *pdev) free_irq(idio16gpio->irq, idio16gpio); gpiochip_remove(&idio16gpio->chip); - release_region(idio16gpio->base, idio16gpio->extent); return 0; } |