A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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gpio: gpio-tegra: Fix race in installing chained IRQ handler

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Fix a race where a pending interrupt could be received and the handler
called before the handler's data has been setup, by converting to
irq_set_chained_handler_and_data().

Signed-off-by: Russell King <[email protected]>
Cc: Alexandre Courbot <[email protected]>
Cc: Hans Ulli Kroll <[email protected]>
Cc: Jason Cooper <[email protected]>
Cc: Lee Jones <[email protected]>
Cc: Linus Walleij <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Russell King 2015-06-16 23:06:50 +01:00 • committed by Thomas Gleixner
commit e88d251d6a
1 changed files with 2 additions and 2 deletions
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4
drivers/gpio/gpio-tegra.c
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@ -515,8 +515,8 @@ static int tegra_gpio_probe(struct platform_device *pdev)
for (i = 0; i < tegra_gpio_bank_count; i++) {
bank = &tegra_gpio_banks[i];
irq_set_chained_handler(bank->irq, tegra_gpio_irq_handler);
irq_set_handler_data(bank->irq, bank);
irq_set_chained_handler_and_data(bank->irq,
tegra_gpio_irq_handler, bank);
for (j = 0; j < 4; j++)
spin_lock_init(&bank->lvl_lock[j]);