[PATCH 4.19 09/64] irqchip/mbigen: Free msi_desc on device teardown

From: Greg Kroah-Hartman
Date: Wed Apr 22 2020 - 06:14:09 EST


From: Zenghui Yu <yuzenghui@xxxxxxxxxx>

commit edfc23f6f9fdbd7825d50ac1f380243cde19b679 upstream.

Using irq_domain_free_irqs_common() on the irqdomain free path will
leave the MSI descriptor unfreed when platform devices get removed.
Properly free it by MSI domain free function.

Fixes: 9650c60ebfec0 ("irqchip/mbigen: Create irq domain for each mbigen device")
Signed-off-by: Zenghui Yu <yuzenghui@xxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200408114352.1604-1-yuzenghui@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/irqchip/irq-mbigen.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/irqchip/irq-mbigen.c
+++ b/drivers/irqchip/irq-mbigen.c
@@ -231,10 +231,16 @@ static int mbigen_irq_domain_alloc(struc
return 0;
}

+static void mbigen_irq_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs)
+{
+ platform_msi_domain_free(domain, virq, nr_irqs);
+}
+
static const struct irq_domain_ops mbigen_domain_ops = {
.translate = mbigen_domain_translate,
.alloc = mbigen_irq_domain_alloc,
- .free = irq_domain_free_irqs_common,
+ .free = mbigen_irq_domain_free,
};

static int mbigen_of_create_domain(struct platform_device *pdev,