linux-kernel - [PATCH] rapidio: fix the missed put_device() for rio_mport_add

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Message-ID: <20200922072525.42330-1-jingxiangfeng@huawei.com>
Date:   Tue, 22 Sep 2020 15:25:25 +0800
From:   Jing Xiangfeng <jingxiangfeng@...wei.com>
To:     <mporter@...nel.crashing.org>, <alex.bou9@...il.com>,
        <akpm@...ux-foundation.org>, <gustavoars@...nel.org>,
        <jhubbard@...dia.com>, <keescook@...omium.org>,
        <madhuparnabhowmik10@...il.com>, <dan.carpenter@...cle.com>
CC:     <linux-kernel@...r.kernel.org>, <jingxiangfeng@...wei.com>
Subject: [PATCH] rapidio: fix the missed put_device() for rio_mport_add_riodev

rio_mport_add_riodev() misses to call put_device() when the device
already exists. Add the missed function call to fix it.

Fixes: e8de370188d0 ("rapidio: add mport char device driver")
Signed-off-by: Jing Xiangfeng <jingxiangfeng@...wei.com>
---
 drivers/rapidio/devices/rio_mport_cdev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c
index a30342942e26..829fe2b7c437 100644
--- a/drivers/rapidio/devices/rio_mport_cdev.c
+++ b/drivers/rapidio/devices/rio_mport_cdev.c
@@ -1679,6 +1679,7 @@ static int rio_mport_add_riodev(struct mport_cdev_priv *priv,
 	struct rio_dev *rdev;
 	struct rio_switch *rswitch = NULL;
 	struct rio_mport *mport;
+	struct device *dev;
 	size_t size;
 	u32 rval;
 	u32 swpinfo = 0;
@@ -1693,8 +1694,10 @@ static int rio_mport_add_riodev(struct mport_cdev_priv *priv,
 	rmcd_debug(RDEV, "name:%s ct:0x%x did:0x%x hc:0x%x", dev_info.name,
 		   dev_info.comptag, dev_info.destid, dev_info.hopcount);
 
-	if (bus_find_device_by_name(&rio_bus_type, NULL, dev_info.name)) {
+	dev = bus_find_device_by_name(&rio_bus_type, NULL, dev_info.name);
+	if (dev) {
 		rmcd_debug(RDEV, "device %s already exists", dev_info.name);
+		put_device(dev);
 		return -EEXIST;
 	}
 
-- 
2.17.1