From dbbc93576e03fbe24b365fab0e901eb442237a8a Mon Sep 17 00:00:00 2001 From: Bixuan Cui Date: Tue, 18 May 2021 11:31:17 +0800 Subject: [PATCH] genirq/msi: Ensure deactivation on teardown msi_domain_alloc_irqs() invokes irq_domain_activate_irq(), but msi_domain_free_irqs() does not enforce deactivation before tearing down the interrupts. This happens when PCI/MSI interrupts are set up and never used before being torn down again, e.g. in error handling pathes. The only place which cleans that up is the error handling path in msi_domain_alloc_irqs(). Move the cleanup from msi_domain_alloc_irqs() into msi_domain_free_irqs() to cure that. Fixes: f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early") Signed-off-by: Bixuan Cui Signed-off-by: Thomas Gleixner Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210518033117.78104-1-cuibixuan@huawei.com --- kernel/irq/msi.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index c41965e..85df3ca 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -476,11 +476,6 @@ skip_activate: return 0; cleanup: - for_each_msi_vector(desc, i, dev) { - irq_data = irq_domain_get_irq_data(domain, i); - if (irqd_is_activated(irq_data)) - irq_domain_deactivate_irq(irq_data); - } msi_domain_free_irqs(domain, dev); return ret; } @@ -505,7 +500,15 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev) { + struct irq_data *irq_data; struct msi_desc *desc; + int i; + + for_each_msi_vector(desc, i, dev) { + irq_data = irq_domain_get_irq_data(domain, i); + if (irqd_is_activated(irq_data)) + irq_domain_deactivate_irq(irq_data); + } for_each_msi_entry(desc, dev) { /* -- 2.7.4