[PATCH] phy: tegra: xusb: check the return value of devm_kzalloc() in tegra_xusb_setup_usb_role_switch()

[williamsukatube at 163.com]

From: William Dean <williamsukatube at gmail.com>

The function devm_kzalloc() in tegra_xusb_setup_usb_role_switch()
can fail, so its return value should be checked.

Fixes: f67213cee2b35 ("phy: tegra: xusb: Add usb-role-switch support")
Reported-by: Hacash Robot <hacashRobot at santino.com>
Signed-off-by: William Dean <williamsukatube at gmail.com>
---
 drivers/phy/tegra/xusb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index aa5237eacd29..e3611fb4c779 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -668,6 +668,8 @@ static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port)
 	port->dev.driver = devm_kzalloc(&port->dev,
 					sizeof(struct device_driver),
 					GFP_KERNEL);
+	if (!port->dev.driver)
+		return -ENOMEM;
 	port->dev.driver->owner	 = THIS_MODULE;
 
 	port->usb_role_sw = usb_role_switch_register(&port->dev,
-- 
2.25.1