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Commit 7c7ad414 authored by Pali Rohár's avatar Pali Rohár Committed by Greg Kroah-Hartman
Browse files

irqchip/armada-370-xp: Do not allow mapping IRQ 0 and 1 



[ Upstream commit 3cef738208e5c3cb7084e208caf9bbf684f24feb ]

IRQs 0 (IPI) and 1 (MSI) are handled internally by this driver,
generic_handle_domain_irq() is never called for these IRQs.

Disallow mapping these IRQs.

[ Marek: changed commit message ]

Signed-off-by: default avatarPali Rohár <pali@kernel.org>
Signed-off-by: default avatarMarek Behún <kabel@kernel.org>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 28592677

drivers/irqchip/irq-armada-370-xp.c

+4 −0
Original line number Diff line number Diff line
@@ -346,6 +346,10 @@ static struct irq_chip armada_370_xp_irq_chip = { 
static int armada_370_xp_mpic_irq_map(struct irq_domain *h,

				      unsigned int virq, irq_hw_number_t hw)

{

	/* IRQs 0 and 1 cannot be mapped, they are handled internally */

	if (hw <= 1)

		return -EINVAL;



	armada_370_xp_irq_mask(irq_get_irq_data(virq));

	if (!is_percpu_irq(hw))

		writel(hw, per_cpu_int_base +