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irq: irq-keystone: 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 23:06:56 +01:00 • committed by Thomas Gleixner
commit 9414b6e2d5
1 changed files with 1 additions and 2 deletions
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3
drivers/irqchip/irq-keystone.c
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@ -184,8 +184,7 @@ static int keystone_irq_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, kirq);
irq_set_chained_handler(kirq->irq, keystone_irq_handler);
irq_set_handler_data(kirq->irq, kirq);
irq_set_chained_handler_and_data(kirq->irq, keystone_irq_handler, kirq);
/* clear all source bits */
keystone_irq_writel(kirq, ~0x0);