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pinctrl: armada-37xx: Fix spurious irq management

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commit 702d1e81fe upstream.

Until now, if we found spurious irq in irq_handler, we only updated the
status in register but not the status in the code. Due to this the system
will got stuck dues to the infinite loop

[gregory.clement@bootlin.com: update comment and add fix and stable tags]
Fixes: 30ac0d3b07 ("pinctrl: armada-37xx: Add edge both type gpio irq support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Terry Zhou <bjzhou@marvell.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Terry Zhou
2018-05-23 10:44:05 +02:00
committed by Greg Kroah-Hartman
parent 6feb00b1af
commit 1bdeee56be
1 changed files with 2 additions and 1 deletions
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3
drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
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@@ -679,12 +679,13 @@ static void armada_37xx_irq_handler(struct irq_desc *desc)
writel(1 << hwirq,
info->base +
IRQ_STATUS + 4 * i);
continue;
goto update_status;
}
}
generic_handle_irq(virq);
update_status:
/* Update status in case a new IRQ appears */
spin_lock_irqsave(&info->irq_lock, flags);
status = readl_relaxed(info->base +