The following commit has been merged into the irq/urgent branch of tip:
Commit-ID: dbbc93576e03fbe24b365fab0e901eb442237a8a Gitweb: https://git.kernel.org/tip/dbbc93576e03fbe24b365fab0e901eb442237a8a Author: Bixuan Cui cuibixuan@huawei.com AuthorDate: Tue, 18 May 2021 11:31:17 +08:00 Committer: Thomas Gleixner tglx@linutronix.de CommitterDate: Tue, 10 Aug 2021 15:55:19 +02:00
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 cuibixuan@huawei.com Signed-off-by: Thomas Gleixner tglx@linutronix.de 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) { /*