[PATCH v2 5/9] of/irq: Fix device node refcount leakages in of_irq_count()

[Zijun Hu]

From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>

of_irq_count() invokes of_irq_parse_one() to count IRQs, and successful
invocation of the later will get device node @irq.np refcount, but the
former does not put the refcount before next iteration invocation, hence
causes device node refcount leakages.

Fix by putting @irq.np refcount before the next iteration invocation.

Fixes: 3da5278727a8 ("of/irq: Rework of_irq_count()")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
---
 drivers/of/irq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index c41b2533d86d8eceabe8f2e43842af33f22febff..95a482a584740c3a0f55b791157072166dffffe0 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -518,8 +518,10 @@ int of_irq_count(struct device_node *dev)
 	struct of_phandle_args irq;
 	int nr = 0;
 
-	while (of_irq_parse_one(dev, nr, &irq) == 0)
+	while (of_irq_parse_one(dev, nr, &irq) == 0) {
+		of_node_put(irq.np);
 		nr++;
+	}
 
 	return nr;
 }

-- 
2.34.1