diff options
| author | Grygorii Strashko <grygorii.strashko@linaro.org> | 2015-05-22 17:35:49 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-06-01 16:51:16 +0200 |
| commit | 1562e4618ded89b07d145d6985f469fe8be04830 (patch) | |
| tree | 24d0116df779b7d32efd61d23697111674e369df | |
| parent | 5f982c70a7c3382d3532ac6d13fdea48ab38b934 (diff) | |
| download | linux-1562e4618ded89b07d145d6985f469fe8be04830.tar.bz2 | |
gpio: omap: fix error handling in omap_gpio_irq_type
The GPIO bank will be kept powered in case if input parameters
are invalid or error occurred in omap_gpio_irq_type.
Hence, fix it by ensuring that GPIO bank will be unpowered
in case of errors and add additional check of value returned
from omap_set_gpio_triggering().
Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/gpio/gpio-omap.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 505266153b4c..81e229f5ade3 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -488,9 +488,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) unsigned long flags; unsigned offset = d->hwirq; - if (!BANK_USED(bank)) - pm_runtime_get_sync(bank->dev); - if (type & ~IRQ_TYPE_SENSE_MASK) return -EINVAL; @@ -498,12 +495,18 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH))) return -EINVAL; + if (!BANK_USED(bank)) + pm_runtime_get_sync(bank->dev); + spin_lock_irqsave(&bank->lock, flags); retval = omap_set_gpio_triggering(bank, offset, type); + if (retval) + goto error; omap_gpio_init_irq(bank, offset); if (!omap_gpio_is_input(bank, offset)) { spin_unlock_irqrestore(&bank->lock, flags); - return -EINVAL; + retval = -EINVAL; + goto error; } spin_unlock_irqrestore(&bank->lock, flags); @@ -512,6 +515,11 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) __irq_set_handler_locked(d->irq, handle_edge_irq); + return 0; + +error: + if (!BANK_USED(bank)) + pm_runtime_put(bank->dev); return retval; } |