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authorBixuan Cui <cuibixuan@huawei.com>2021-05-18 11:31:17 +0800
committerThomas Gleixner <tglx@linutronix.de>2021-08-10 15:55:19 +0200
commitdbbc93576e03fbe24b365fab0e901eb442237a8a (patch)
treebe4713c7417a084e95e0b5e63dec6d339ce6e9df /kernel/irq/msi.c
parentb9cc7d8a4656a6e815852c27ab50365009cb69c1 (diff)
downloadlwn-dbbc93576e03fbe24b365fab0e901eb442237a8a.tar.gz
lwn-dbbc93576e03fbe24b365fab0e901eb442237a8a.zip
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
Diffstat (limited to 'kernel/irq/msi.c')
-rw-r--r--kernel/irq/msi.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index c41965e348b5..85df3ca03efe 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) {
/*