From: Pali Rohár pali@kernel.org
stable inclusion from stable-v4.19.322 commit 1d755d4fb238315c3b3e50e6f3117a0d79f72c29 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IATEDW
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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: Pali Rohár pali@kernel.org Signed-off-by: Marek Behún kabel@kernel.org Signed-off-by: Thomas Gleixner tglx@linutronix.de Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yuntao Liu liuyuntao12@huawei.com --- drivers/irqchip/irq-armada-370-xp.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c index c9bdc5221b82..3eebcd90749a 100644 --- a/drivers/irqchip/irq-armada-370-xp.c +++ b/drivers/irqchip/irq-armada-370-xp.c @@ -350,6 +350,10 @@ 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 +