linux-kernel - [PATCH 4.9 24/45] usb: chipidea: ci_hdrc_imx: add missing put_device() call in usbmisc_get_init

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Message-Id: <20210111130034.822910169@linuxfoundation.org>
Date:   Mon, 11 Jan 2021 14:01:02 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yu Kuai <yukuai3@...wei.com>
Subject: [PATCH 4.9 24/45] usb: chipidea: ci_hdrc_imx: add missing put_device() call in usbmisc_get_init_data()

From: Yu Kuai <yukuai3@...wei.com>

commit 83a43ff80a566de8718dfc6565545a0080ec1fb5 upstream.

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: ef12da914ed6 ("usb: chipidea: imx: properly check for usbmisc")
Signed-off-by: Yu Kuai <yukuai3@...wei.com>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20201117011430.642589-1-yukuai3@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/chipidea/ci_hdrc_imx.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -133,9 +133,13 @@ static struct imx_usbmisc_data *usbmisc_
 	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;
 
 	if (of_find_property(np, "disable-over-current", NULL))