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From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Tony Lindgren <tony@atomide.com>, Vignesh R <vigneshr@ti.com>,
	Aaro Koskinen <aaro.koskinen@iki.fi>,
	linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] i2c: omap: Fix rumtime PM imbalance on error
Date: Wed,  7 Apr 2021 11:30:30 +0800
Message-ID: <20210407033030.13419-1-dinghao.liu@zju.edu.cn> (raw)

pm_runtime_get_sync() will increase the rumtime PM counter
even it returns an error. Thus a pairing decrement is needed
to prevent refcount leak. Fix this by replacing this API with
pm_runtime_resume_and_get(), which will not change the runtime
PM counter on error.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/i2c/busses/i2c-omap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 12ac4212aded..c9ee0875a79d 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -1404,7 +1404,7 @@ omap_i2c_probe(struct platform_device *pdev)
 	pm_runtime_set_autosuspend_delay(omap->dev, OMAP_I2C_PM_TIMEOUT);
 	pm_runtime_use_autosuspend(omap->dev);
 
-	r = pm_runtime_get_sync(omap->dev);
+	r = pm_runtime_resume_and_get(omap->dev);
 	if (r < 0)
 		goto err_free_mem;
 
-- 
2.17.1


             reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-07  3:30 Dinghao Liu [this message]
2021-04-07  6:10 ` Tony Lindgren
2021-04-07  6:19 ` Vignesh Raghavendra
2021-04-07  6:27   ` Tony Lindgren
2021-04-07  7:45     ` Vignesh Raghavendra
2021-04-07  9:59       ` Tony Lindgren
2021-04-14  7:54 ` Wolfram Sang

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