[PATCH v4 07/14] irqchip/dw-apb-ictl: Fix potential resource leaks

[Tiezhu Yang]

In the function dw_apb_ictl_init(), system resources "irq" and "domain"
were not released in a few error cases. Thus add jump targets for the
completion of the desired exception handling.

Fixes: 350d71b94fc9 ("irqchip: add DesignWare APB ICTL interrupt controller")
Signed-off-by: Tiezhu Yang <yangtie...@loongson.cn>
---
 drivers/irqchip/irq-dw-apb-ictl.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-dw-apb-ictl.c 
b/drivers/irqchip/irq-dw-apb-ictl.c
index e4550e9..bc9b750 100644
--- a/drivers/irqchip/irq-dw-apb-ictl.c
+++ b/drivers/irqchip/irq-dw-apb-ictl.c
@@ -86,12 +86,13 @@ static int __init dw_apb_ictl_init(struct device_node *np,
        ret = of_address_to_resource(np, 0, &r);
        if (ret) {
                pr_err("%pOF: unable to get resource\n", np);
-               return ret;
+               goto err_irq_dispose;
        }
 
        if (!request_mem_region(r.start, resource_size(&r), np->full_name)) {
                pr_err("%pOF: unable to request mem region\n", np);
-               return -ENOMEM;
+               ret = -ENOMEM;
+               goto err_irq_dispose;
        }
 
        iobase = ioremap(r.start, resource_size(&r));
@@ -133,7 +134,7 @@ static int __init dw_apb_ictl_init(struct device_node *np,
                                             IRQ_GC_INIT_MASK_CACHE);
        if (ret) {
                pr_err("%pOF: unable to alloc irq domain gc\n", np);
-               goto err_unmap;
+               goto err_domain_remove;
        }
 
        for (i = 0; i < DIV_ROUND_UP(nrirqs, 32); i++) {
@@ -150,10 +151,14 @@ static int __init dw_apb_ictl_init(struct device_node *np,
 
        return 0;
 
+err_domain_remove:
+       irq_domain_remove(domain);
 err_unmap:
        iounmap(iobase);
 err_release:
        release_mem_region(r.start, resource_size(&r));
+err_irq_dispose:
+       irq_dispose_mapping(irq);
        return ret;
 }
 IRQCHIP_DECLARE(dw_apb_ictl,
-- 
2.1.0