linux-kernel - [PATCH] spi: tegra20-slink: add missing pm_runtime_put if pm_runtime_get

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Date:   Tue,  2 Jun 2020 00:24:04 -0500
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     Laxman Dewangan <ldewangan@...dia.com>,
        Mark Brown <broonie@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        linux-spi@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     emamd001@....edu, wu000273@....edu, kjlu@....edu, smccaman@....edu,
        Navid Emamdoost <navid.emamdoost@...il.com>
Subject: [PATCH] spi: tegra20-slink: add missing pm_runtime_put if pm_runtime_get_sync fails

Call to pm_runtime_get_sync increments counter even in case of
failure leading to incorrect ref count.
Call pm_runtime_put if pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 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..9509b7cb14e4 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -756,6 +756,7 @@ static int tegra_slink_setup(struct spi_device *spi)
 	ret = pm_runtime_get_sync(tspi->dev);
 	if (ret < 0) {
 		dev_err(tspi->dev, "pm runtime failed, e = %d\n", ret);
+		pm_runtime_put(tspi->dev);
 		return ret;
 	}
 
-- 
2.17.1