From 5cfc05761ba0c7f1aa04f0d441fb68a28453d13b Mon Sep 17 00:00:00 2001 From: William Breathitt Gray Date: Wed, 3 Feb 2016 15:15:22 -0500 Subject: [PATCH] gpio: 104-idi-48: Use devm_request_region By the time request_region is called in the ACCES 104-IDI-48 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 Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij --- drivers/gpio/gpio-104-idi-48.c | 25 ++++++++----------------- 1 file changed, 8 insertions(+), 17 deletions(-) diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c index 49b1188..e37cd4c 100644 --- a/drivers/gpio/gpio-104-idi-48.c +++ b/drivers/gpio/gpio-104-idi-48.c @@ -39,7 +39,6 @@ MODULE_PARM_DESC(idi_48_irq, "ACCES 104-IDI-48 interrupt line number"); * @ack_lock: synchronization lock to prevent IRQ handler race conditions * @irq_mask: input 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 * @cos_enb: Change-Of-State IRQ enable boundaries mask */ @@ -49,7 +48,6 @@ struct idi_48_gpio { spinlock_t ack_lock; unsigned char irq_mask[6]; unsigned base; - unsigned extent; unsigned irq; unsigned char cos_enb; }; @@ -227,11 +225,10 @@ static int __init idi_48_probe(struct platform_device *pdev) if (!idi48gpio) 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; } idi48gpio->chip.label = name; @@ -243,7 +240,6 @@ static int __init idi_48_probe(struct platform_device *pdev) idi48gpio->chip.direction_input = idi_48_gpio_direction_input; idi48gpio->chip.get = idi_48_gpio_get; idi48gpio->base = base; - idi48gpio->extent = extent; idi48gpio->irq = irq; spin_lock_init(&idi48gpio->lock); @@ -253,7 +249,7 @@ static int __init idi_48_probe(struct platform_device *pdev) err = gpiochip_add_data(&idi48gpio->chip, idi48gpio); if (err) { dev_err(dev, "GPIO registering failed (%d)\n", err); - goto err_gpio_register; + return err; } /* Disable IRQ by default */ @@ -264,24 +260,20 @@ static int __init idi_48_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, idi_48_irq_handler, IRQF_SHARED, name, idi48gpio); 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(&idi48gpio->chip); -err_gpio_register: - release_region(base, extent); -err_lock_io_port: return err; } @@ -291,7 +283,6 @@ static int idi_48_remove(struct platform_device *pdev) free_irq(idi48gpio->irq, idi48gpio); gpiochip_remove(&idi48gpio->chip); - release_region(idi48gpio->base, idi48gpio->extent); return 0; } -- 2.7.4