diff options
| author |   Boris Brezillon <boris.brezillon@free-electrons.com> | 2015-02-08 19:23:42 +0100 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2015-03-18 02:01:36 +0100 |
| commit | bd8733738c5af6114dd15d340b3f8713e9b624c2 (patch) | |
| tree | 38ca4f66468bf477ba9b20c7dab3021f6920ad06 /drivers/pinctrl/pinctrl-at91.c | |
| parent | pinctrl: update direction_output function of cherryview driver (diff) | |
| download | linux-dev-bd8733738c5af6114dd15d340b3f8713e9b624c2.tar.xz linux-dev-bd8733738c5af6114dd15d340b3f8713e9b624c2.zip | |
pinctrl: at91: move lock/unlock_as_irq calls into request/release
The gpiochip_lock_as_irq call can fail and return an error,
while the irq_startup is not expected to fail (returns an
unsigned int which is not checked by irq core code).
irq_request/release_resources functions have been created
to address this problem.
Move gpiochip_lock/unlock_as_irq calls into
irq_request/release_resources functions to prevent using a
gpio as an irq if the gpiochip_lock_as_irq call failed.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-at91.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-at91.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index f4cd0b9b2438..a4814066ea08 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -1477,28 +1477,25 @@ static void gpio_irq_ack(struct irq_data *d) /* the interrupt is already cleared before by reading ISR */ } -static unsigned int gpio_irq_startup(struct irq_data *d) +static int gpio_irq_request_res(struct irq_data *d) { struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); unsigned pin = d->hwirq; int ret; ret = gpiochip_lock_as_irq(&at91_gpio->chip, pin); - if (ret) { + if (ret) dev_err(at91_gpio->chip.dev, "unable to lock pind %lu IRQ\n", d->hwirq); - return ret; - } - gpio_irq_unmask(d); - return 0; + + return ret; } -static void gpio_irq_shutdown(struct irq_data *d) +static void gpio_irq_release_res(struct irq_data *d) { struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); unsigned pin = d->hwirq; - gpio_irq_mask(d); gpiochip_unlock_as_irq(&at91_gpio->chip, pin); } @@ -1577,8 +1574,8 @@ void at91_pinctrl_gpio_resume(void) static struct irq_chip gpio_irqchip = { .name = "GPIO", .irq_ack = gpio_irq_ack, - .irq_startup = gpio_irq_startup, - .irq_shutdown = gpio_irq_shutdown, + .irq_request_resources = gpio_irq_request_res, + .irq_release_resources = gpio_irq_release_res, .irq_disable = gpio_irq_mask, .irq_mask = gpio_irq_mask, .irq_unmask = gpio_irq_unmask, |