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irq: spear-shirq: 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/E1Z4z0X-0002T1-6U@rmk-PC.arm.linux.org.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Russell King 2015-06-16 23:07:01 +01:00 committed by Thomas Gleixner
parent 9414b6e2d5
commit 2aedd0fdc6
1 changed files with 1 additions and 2 deletions
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3
drivers/irqchip/spear-shirq.c
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@ -207,8 +207,7 @@ static void __init spear_shirq_register(struct spear_shirq *shirq,
if (!shirq->irq_chip)
return;
irq_set_chained_handler(parent_irq, shirq_handler);
irq_set_handler_data(parent_irq, shirq);
irq_set_chained_handler_and_data(parent_irq, shirq_handler, shirq);
for (i = 0; i < shirq->nr_irqs; i++) {
irq_set_chip_and_handler(shirq->virq_base + i,