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irq: irq-keystone: Fix race in installing chained IRQ handler 

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 <rmk+kernel@arm.linux.org.uk>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/E1Z4z0S-0002Ss-1V@rmk-PC.arm.linux.org.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Russell King 2015-06-16 23:06:56 +01:00 committed by Thomas Gleixner
parent e88d251d6a
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);