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gpio: tegra: Make lockdep class file-scoped 

Commit b546be0db9 ("gpio: tegra: Get rid of all file scoped global
variables") moved all file scoped variables into the driver-private
structure to allow potentially multiple instances of the driver. The
change also included turning the lockdep class into a driver-private
field, which doesn't work and produces error messages such as this:

	[    0.142310] BUG: key ffff8000fb3f7ab0 not in .data!

Make the lockdep class file-scoped again to fix this issue.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Thierry Reding 2016-06-06 18:56:27 +02:00 committed by Linus Walleij
parent 0ac3c0a402
commit 9ee8ff4867
1 changed files with 7 additions and 2 deletions
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9
drivers/gpio/gpio-tegra.c
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@ -98,7 +98,6 @@ struct tegra_gpio_info {
const struct tegra_gpio_soc_config *soc;
struct gpio_chip gc;
struct irq_chip ic;
struct lock_class_key lock_class;
u32 bank_count;
};
@ -547,6 +546,12 @@ static const struct dev_pm_ops tegra_gpio_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(tegra_gpio_suspend, tegra_gpio_resume)
};
/*
* This lock class tells lockdep that GPIO irqs are in a different category
* than their parents, so it won't report false recursion.
*/
static struct lock_class_key gpio_lock_class;
static int tegra_gpio_probe(struct platform_device *pdev)
{
const struct tegra_gpio_soc_config *config;
@ -660,7 +665,7 @@ static int tegra_gpio_probe(struct platform_device *pdev)
bank = &tgi->bank_info[GPIO_BANK(gpio)];
irq_set_lockdep_class(irq, &tgi->lock_class);
irq_set_lockdep_class(irq, &gpio_lock_class);
irq_set_chip_data(irq, bank);
irq_set_chip_and_handler(irq, &tgi->ic, handle_simple_irq);
}