From: Li Jun <jun.li@nxp.com>
Date: Wed, 9 Oct 2019 10:52:28 +0800
Subject: usb: chipidea: imx: check data->usbmisc_data against NULL before
 access
Git-commit: df17aa9fb31f6a41aad37b984909d8ef1a958271
Patch-mainline: v5.5-rc1
References: jsc#SLE-16106

As usbmisc_data is optional, so add the check before access its member,
this fix below static checker warning:
drivers/usb/chipidea/ci_hdrc_imx.c:438 ci_hdrc_imx_probe()
warn: 'data->usbmisc_data' can also be NULL
which is introduced by Patch 15b80f7c3a7f:
"usb: chipidea: imx: enable vbus and id wakeup only for OTG events"

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 drivers/usb/chipidea/ci_hdrc_imx.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index 2fde44ca4a48..16700170bc34 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -433,13 +433,15 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
 		goto err_clk;
 	}
 
-	if (!IS_ERR(pdata.id_extcon.edev) ||
-	    of_property_read_bool(np, "usb-role-switch"))
-		data->usbmisc_data->ext_id = 1;
-
-	if (!IS_ERR(pdata.vbus_extcon.edev) ||
-	    of_property_read_bool(np, "usb-role-switch"))
-		data->usbmisc_data->ext_vbus = 1;
+	if (data->usbmisc_data) {
+		if (!IS_ERR(pdata.id_extcon.edev) ||
+		    of_property_read_bool(np, "usb-role-switch"))
+			data->usbmisc_data->ext_id = 1;
+
+		if (!IS_ERR(pdata.vbus_extcon.edev) ||
+		    of_property_read_bool(np, "usb-role-switch"))
+			data->usbmisc_data->ext_vbus = 1;
+	}
 
 	ret = imx_usbmisc_init_post(data->usbmisc_data);
 	if (ret) {