[PATCH V3 09/17] irqchip/gic: Don't initialise chip if mapping IO space fails

Jon Hunter
2016-05-04T16:30:44Z

If we fail to map the address space for the GIC distributor or CPU
interface, then don't attempt to initialise the chip, just WARN and
return.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/irq-gic.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 095bb5b5c3f2..16f632dcc2ad 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -1200,10 +1200,14 @@ gic_of_init(struct device_node *node, struct device_node *parent)
return -ENODEV;

dist_base = of_iomap(node, 0);
- WARN(!dist_base, "unable to map gic dist registers\n");
+ if (WARN(!dist_base, "unable to map gic dist registers\n"))
+ return -ENOMEM;

cpu_base = of_iomap(node, 1);
- WARN(!cpu_base, "unable to map gic cpu registers\n");
+ if (WARN(!cpu_base, "unable to map gic cpu registers\n")) {
+ iounmap(dist_base);
+ return -ENOMEM;
+ }

/*
* Disable split EOI/Deactivate if either HYP is not available
--
2.1.4