diff options
| author | Anti Sullin <anti.sullin@artecdesign.ee> | 2007-09-26 00:01:03 -0400 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2007-09-26 00:01:03 -0400 |
| commit | 006df3024431a50262d4a2898d25924f84fb697a (patch) | |
| tree | 556a42e2e3bc47e947e509fff0ae6613db531628 /drivers/input | |
| parent | 2a8281d72da5dd8da025e6822dadd23a35383895 (diff) | |
Input: gpio_keys - verify that supplied GPIO numbers are valid
As David Brownell pointed out, gpio_keys driver does not check
return code of gpio_to_irq().
This patch adds the gpio_to_irq return code check to gpio_keys
and moves the IRQ edge type setting to request_irq flags to avoid
changing the irq type before we have confirmed we can use it.
Signed-off-by: Anti Sullin <anti.sullin@artecdesign.ee>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/keyboard/gpio_keys.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index 739212252b0..b3069bc00f0 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -78,12 +78,24 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) int irq = gpio_to_irq(button->gpio); unsigned int type = button->type ?: EV_KEY; - set_irq_type(irq, IRQ_TYPE_EDGE_BOTH); - error = request_irq(irq, gpio_keys_isr, IRQF_SAMPLE_RANDOM, - button->desc ? button->desc : "gpio_keys", - pdev); + if (irq < 0) { + error = irq; + printk(KERN_ERR + "gpio-keys: " + "Unable to get irq number for GPIO %d," + "error %d\n", + button->gpio, error); + goto fail; + } + + error = request_irq(irq, gpio_keys_isr, + IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING, + button->desc ? button->desc : "gpio_keys", + pdev); if (error) { - printk(KERN_ERR "gpio-keys: unable to claim irq %d; error %d\n", + printk(KERN_ERR + "gpio-keys: Unable to claim irq %d; error %d\n", irq, error); goto fail; } @@ -93,16 +105,19 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) error = input_register_device(input); if (error) { - printk(KERN_ERR "Unable to register gpio-keys input device\n"); + printk(KERN_ERR + "gpio-keys: Unable to register input device, " + "error: %d\n", error); goto fail; } return 0; fail: - for (i = i - 1; i >= 0; i--) + while (--i >= 0) free_irq(gpio_to_irq(pdata->buttons[i].gpio), pdev); + platform_set_drvdata(pdev, NULL); input_free_device(input); return error; |