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irqchip: sun7i/sun6i: Disable NMI before registering the handler

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It is advisable to disable the NMI before registering the IRQ handler as
registering the IRQ handler unmasks the IRQ on the GIC, so if U-Boot has
left the NMI enabled and the NMI pin is active we will immediately get
an interrupt before any driver has claimed the downstream interrupt of
the NMI.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Carlo Caione <carlo@caione.org>
Cc: maxime.ripard@free-electrons.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-sunxi@googlegroups.com
Link: http://lkml.kernel.org/r/1395939759-11135-3-git-send-email-carlo@caione.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Hans de Goede 2014-03-27 18:02:39 +01:00 committed by Thomas Gleixner
parent 536a44d427
commit 1b422ecd27
1 changed files with 3 additions and 3 deletions
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6
drivers/irqchip/irq-sunxi-nmi.c
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@ -179,12 +179,12 @@ static int __init sunxi_sc_nmi_irq_init(struct device_node *node,
gc->chip_types[1].regs.type = reg_offs->ctrl;
gc->chip_types[1].handler = handle_edge_irq;
irq_set_handler_data(irq, domain);
irq_set_chained_handler(irq, sunxi_sc_nmi_handle_irq);
sunxi_sc_nmi_write(gc, reg_offs->enable, 0);
sunxi_sc_nmi_write(gc, reg_offs->pend, 0x1);
irq_set_handler_data(irq, domain);
irq_set_chained_handler(irq, sunxi_sc_nmi_handle_irq);
return 0;
fail_irqd_remove: