linux-kernel - [PATCH] spi: spi-ti-qspi: Fix runtime PM imbalance on error

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Message-Id: <20200521074643.21088-1-dinghao.liu@zju.edu.cn>
Date:   Thu, 21 May 2020 15:46:43 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] spi: spi-ti-qspi: Fix runtime PM imbalance on error

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@....edu.cn>
---
 drivers/spi/spi-ti-qspi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c
index 366a3e5cca6b..6d24cff2693c 100644
--- a/drivers/spi/spi-ti-qspi.c
+++ b/drivers/spi/spi-ti-qspi.c
@@ -175,6 +175,7 @@ static int ti_qspi_setup(struct spi_device *spi)
 	ret = pm_runtime_get_sync(qspi->dev);
 	if (ret < 0) {
 		dev_err(qspi->dev, "pm_runtime_get_sync() failed\n");
+		pm_runtime_put_autosuspend(qspi->dev);
 		return ret;
 	}
 
-- 
2.17.1