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From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Peter Chen <peter.chen@kernel.org>,
	Pawel Laszczak <pawell@cadence.com>,
	Roger Quadros <rogerq@kernel.org>,
	Aswath Govindraju <a-govindraju@ti.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] [v2] usb: cdns3: Fix runtime PM imbalance on error
Date: Mon, 12 Apr 2021 13:49:07 +0800	[thread overview]
Message-ID: <20210412054908.7975-1-dinghao.liu@zju.edu.cn> (raw)

When cdns3_gadget_start() fails, a pairing PM usage counter
decrement is needed to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---

Changelog:

v2: - Use pm_runtime_put_sync() to decrease refcount.
---
 drivers/usb/cdns3/cdns3-gadget.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
index 582bfeceedb4..a49fc68ec2ef 100644
--- a/drivers/usb/cdns3/cdns3-gadget.c
+++ b/drivers/usb/cdns3/cdns3-gadget.c
@@ -3255,8 +3255,10 @@ static int __cdns3_gadget_init(struct cdns *cdns)
 	pm_runtime_get_sync(cdns->dev);
 
 	ret = cdns3_gadget_start(cdns);
-	if (ret)
+	if (ret) {
+		pm_runtime_put_sync(cdns->dev);
 		return ret;
+	}
 
 	/*
 	 * Because interrupt line can be shared with other components in
-- 
2.17.1


             reply	other threads:[~2021-04-12  5:49 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12  5:49 Dinghao Liu [this message]
2021-04-19  3:55 ` [PATCH] [v2] usb: cdns3: Fix runtime PM imbalance on error Peter Chen

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