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From: George Acosta <acostag.ubuntu@gmail.com>
To: acostag.ubuntu@gmail.com
Cc: Matt Porter <mporter@kernel.crashing.org>,
	Alexandre Bounine <alex.bou9@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	John Hubbard <jhubbard@nvidia.com>,
	"Gustavo A. R. Silva" <gustavoars@kernel.org>,
	Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>,
	Kees Cook <keescook@chromium.org>,
	Dan Carpenter <dan.carpenter@oracle.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH] rapidio: fix get device imbalance on error
Date: Thu, 20 Aug 2020 22:44:57 -0500
Message-ID: <20200821034458.22472-1-acostag.ubuntu@gmail.com> (raw)

Fix the imbalance in mport_cdev_open.
Call put_device in error path to balance the
refcount that increased by the get_device.

Fixes: e8de370188d0 ("rapidio: add mport char device driver")
Signed-off-by: George Acosta <acostag.ubuntu@gmail.com>
---
 drivers/rapidio/devices/rio_mport_cdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c
index c07ceec3c6d4..3b68e00eb40f 100644
--- a/drivers/rapidio/devices/rio_mport_cdev.c
+++ b/drivers/rapidio/devices/rio_mport_cdev.c
@@ -1908,6 +1908,7 @@ static int mport_cdev_open(struct inode *inode, struct file *filp)
 			  sizeof(struct rio_event) * MPORT_EVENT_DEPTH,
 			  GFP_KERNEL);
 	if (ret < 0) {
+		put_device(&chdev->dev);
 		dev_err(&chdev->dev, DRV_NAME ": kfifo_alloc failed\n");
 		ret = -ENOMEM;
 		goto err_fifo;
-- 
2.17.1


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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-21  3:44 George Acosta [this message]
2020-08-21  8:14 ` Dan Carpenter

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