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From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Laxman Dewangan <ldewangan@nvidia.com>,
	Mark Brown <broonie@kernel.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	linux-spi@vger.kernel.org, linux-tegra@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] [v2] spi: tegra20-slink: Fix runtime PM imbalance on error
Date: Sat, 23 May 2020 20:29:09 +0800
Message-ID: <20200523122909.25247-1-dinghao.liu@zju.edu.cn> (raw)

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

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

Changelog:

v2: - Use pm_runtime_put_noidle() instead of pm_runtime_put().
---
 drivers/spi/spi-tegra20-slink.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 7f4d932dade7..a07b72e9c344 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -1118,6 +1118,7 @@ static int tegra_slink_probe(struct platform_device *pdev)
 	ret = pm_runtime_get_sync(&pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "pm runtime get failed, e = %d\n", ret);
+		pm_runtime_put_noidle(&pdev->dev);
 		goto exit_pm_disable;
 	}
 	tspi->def_command_reg  = SLINK_M_S;
-- 
2.17.1


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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-23 12:29 Dinghao Liu [this message]
2020-05-28 13:07 ` Mark Brown

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