linux-kernel - [PATCH 4.19 037/425] spi: dln2: Fix reference leak to master

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Message-Id: <20210520092132.633041181@linuxfoundation.org>
Date:   Thu, 20 May 2021 11:16:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 037/425] spi: dln2: Fix reference leak to master

From: Wei Yongjun <weiyongjun1@...wei.com>

[ Upstream commit 9b844b087124c1538d05f40fda8a4fec75af55be ]

Call spi_master_get() holds the reference count to master device, thus
we need an additional spi_master_put() call to reduce the reference
count, otherwise we will leak a reference to master.

This commit fix it by removing the unnecessary spi_master_get().

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
Link: https://lore.kernel.org/r/20210409082955.2907950-1-weiyongjun1@huawei.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi-dln2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-dln2.c b/drivers/spi/spi-dln2.c
index b62a99caacc0..a41adea48618 100644
--- a/drivers/spi/spi-dln2.c
+++ b/drivers/spi/spi-dln2.c
@@ -783,7 +783,7 @@ exit_free_master:
 
 static int dln2_spi_remove(struct platform_device *pdev)
 {
-	struct spi_master *master = spi_master_get(platform_get_drvdata(pdev));
+	struct spi_master *master = platform_get_drvdata(pdev);
 	struct dln2_spi *dln2 = spi_master_get_devdata(master);
 
 	pm_runtime_disable(&pdev->dev);
-- 
2.30.2