linux-kernel - [PATCH] usb: chipidea: ci_hdrc_imx: add missing put_device() call in usbmisc_get_init

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Message-ID: <20201117011430.642589-1-yukuai3@huawei.com>
Date:   Tue, 17 Nov 2020 09:14:30 +0800
From:   Yu Kuai <yukuai3@...wei.com>
To:     <Peter.Chen@....com>, <gregkh@...uxfoundation.org>,
        <shawnguo@...nel.org>, <s.hauer@...gutronix.de>
CC:     <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <yukuai3@...wei.com>,
        <yi.zhang@...wei.com>, <zhangxiaoxu5@...wei.com>
Subject: [PATCH] usb: chipidea: ci_hdrc_imx: add missing put_device() call in usbmisc_get_init_data()

if of_find_device_by_node() succeed, usbmisc_get_init_data() doesn't have
a corresponding put_device(). Thus add put_device() to fix the exception
handling for this function implementation.

Fixes: commit ef12da914ed6 ("usb: chipidea: imx: properly check for usbmisc")
Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/usb/chipidea/ci_hdrc_imx.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index 25c65accf089..d4b1069b86ec 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -138,9 +138,13 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 	misc_pdev = of_find_device_by_node(args.np);
 	of_node_put(args.np);
 
-	if (!misc_pdev || !platform_get_drvdata(misc_pdev))
+	if (!misc_pdev)
 		return ERR_PTR(-EPROBE_DEFER);
 
+	if (!platform_get_drvdata(misc_pdev)) {
+		put_device(&misc_pdev->dev);
+		return ERR_PTR(-EPROBE_DEFER);
+	}
 	data->dev = &misc_pdev->dev;
 
 	/*
-- 
2.25.4