Documentation for irq_domain_remove() says that all mapping within the
domain must be disposed prior to domain remove.
Currently bridge irq is not disposed in pci-aardvark.c device unbind callback
which cause that kernel crashes after unloading driver and trying to read
/sys/kernel/debug/irq/irqs/<num> or /proc/interrupts.
Fixes: 815bc3136867 ("PCI: aardvark: Use separate INTA interrupt for emulated root bridge")
Signed-off-by: Pali Rohár <pali@xxxxxxxxxx>
---
drivers/pci/controller/pci-aardvark.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index 6cb65e64859d..8bea5801d50a 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -1479,6 +1479,12 @@ static int advk_pcie_init_rp_irq_domain(struct advk_pcie *pcie)
static void advk_pcie_remove_rp_irq_domain(struct advk_pcie *pcie)
{
+ int virq;
+
+ virq = irq_find_mapping(pcie->rp_irq_domain, 0);
+ if (virq > 0)
+ irq_dispose_mapping(virq);
+
irq_domain_remove(pcie->rp_irq_domain);
}
--
2.20.1
