linux-kernel - [PATCH 5.18 030/339] usb: typec: mux: Check dev_set

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Date:   Mon, 13 Jun 2022 12:07:35 +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,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 030/339] usb: typec: mux: Check dev_set_name() return value

From: Bjorn Andersson <bjorn.andersson@...aro.org>

[ Upstream commit b9fa0292490db39d6542f514117333d366ec0011 ]

It's possible that dev_set_name() returns -ENOMEM, catch and handle this.

Fixes: 3370db35193b ("usb: typec: Registering real device entries for the muxes")
Reported-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Link: https://lore.kernel.org/r/20220422222351.1297276-4-bjorn.andersson@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/typec/mux.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c
index c8340de0ed49..d2aaf294b649 100644
--- a/drivers/usb/typec/mux.c
+++ b/drivers/usb/typec/mux.c
@@ -131,8 +131,11 @@ typec_switch_register(struct device *parent,
 	sw->dev.class = &typec_mux_class;
 	sw->dev.type = &typec_switch_dev_type;
 	sw->dev.driver_data = desc->drvdata;
-	dev_set_name(&sw->dev, "%s-switch",
-		     desc->name ? desc->name : dev_name(parent));
+	ret = dev_set_name(&sw->dev, "%s-switch", desc->name ? desc->name : dev_name(parent));
+	if (ret) {
+		put_device(&sw->dev);
+		return ERR_PTR(ret);
+	}
 
 	ret = device_add(&sw->dev);
 	if (ret) {
@@ -338,8 +341,11 @@ typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
 	mux->dev.class = &typec_mux_class;
 	mux->dev.type = &typec_mux_dev_type;
 	mux->dev.driver_data = desc->drvdata;
-	dev_set_name(&mux->dev, "%s-mux",
-		     desc->name ? desc->name : dev_name(parent));
+	ret = dev_set_name(&mux->dev, "%s-mux", desc->name ? desc->name : dev_name(parent));
+	if (ret) {
+		put_device(&mux->dev);
+		return ERR_PTR(ret);
+	}
 
 	ret = device_add(&mux->dev);
 	if (ret) {
-- 
2.35.1