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From:   Navid Emamdoost <navid.emamdoost@gmail.com>
To:     Laxman Dewangan <ldewangan@nvidia.com>,
        Jon Hunter <jonathanh@nvidia.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Vinod Koul <vkoul@kernel.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org,
        linux-kernel@vger.kernel.org
Cc:     emamd001@umn.edu, wu000273@umn.edu, kjlu@umn.edu, smccaman@umn.edu,
        Navid Emamdoost <navid.emamdoost@gmail.com>
Subject: [PATCH] dmaengine: tegra210-adma: fix pm_runtime_get_sync failure
Date:   Wed,  3 Jun 2020 13:38:45 -0500
Message-Id: <20200603183845.91054-1-navid.emamdoost@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
---
 drivers/dma/tegra210-adma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
index c4ce5dfb149b..87f2a1bed3aa 100644
--- a/drivers/dma/tegra210-adma.c
+++ b/drivers/dma/tegra210-adma.c
@@ -869,8 +869,10 @@ static int tegra_adma_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 
 	ret = pm_runtime_get_sync(&pdev->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_sync(&pdev->dev);
 		goto rpm_disable;
+	}
 
 	ret = tegra_adma_init(tdma);
 	if (ret)
-- 
2.17.1