linux-kernel - [PATCH] irqchip: gic-pm: Use pm_runtime_resume_and_get() in gic

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Date:   Thu, 24 Nov 2022 14:51:50 +0800
From:   Shang XiaoJing <shangxiaojing@...wei.com>
To:     <tglx@...utronix.de>, <maz@...nel.org>, <jonathanh@...dia.com>,
        <linux-kernel@...r.kernel.org>
CC:     <shangxiaojing@...wei.com>
Subject: [PATCH] irqchip: gic-pm: Use pm_runtime_resume_and_get() in gic_probe()

gic_probe() calls pm_runtime_get_sync() and added fail path as
rpm_put to put usage_counter. However, pm_runtime_get_sync()
will increment usage_counter even it failed. Fix it by replacing it with
pm_runtime_resume_and_get() to keep usage counter balanced.

Fixes: 9c8edddfc992 ("irqchip/gic: Add platform driver for non-root GICs that require RPM")
Signed-off-by: Shang XiaoJing <shangxiaojing@...wei.com>
---
 drivers/irqchip/irq-gic-pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-pm.c b/drivers/irqchip/irq-gic-pm.c
index b60e1853593f..3989d16f997b 100644
--- a/drivers/irqchip/irq-gic-pm.c
+++ b/drivers/irqchip/irq-gic-pm.c
@@ -102,7 +102,7 @@ static int gic_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(dev);
 
-	ret = pm_runtime_get_sync(dev);
+	ret = pm_runtime_resume_and_get(dev);
 	if (ret < 0)
 		goto rpm_disable;
 
-- 
2.17.1