linux-kernel - [PATCH v4 2/2] usb: dwc3: drd: Improve dwc3_get

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Message-Id: <20201214110741.8512-3-semen.protsenko@linaro.org>
Date:   Mon, 14 Dec 2020 13:07:41 +0200
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        John Stultz <john.stultz@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH v4 2/2] usb: dwc3: drd: Improve dwc3_get_extcon() style

The previous change ("usb: dwc3: drd: Avoid error when extcon is
missing") changed the code flow in dwc3_get_extcon() function, leading
to unnecessary if-branch. This patch does housekeeping by reworking the
code for obtaining an extcon device from the "port" node.

Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
Changes in v4:
  - Moved the comment from patch 2/2 to 1/2
  - Fixed typos in commit message
Changes in v3:
  - Split patch into two patches: logic diff and style diff

 drivers/usb/dwc3/drd.c | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index da428cf2eb5b..e2b68bb770d1 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c
@@ -441,8 +441,8 @@ static int dwc3_drd_notifier(struct notifier_block *nb,
 static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
 {
 	struct device *dev = dwc->dev;
-	struct device_node *np_phy, *np_conn;
-	struct extcon_dev *edev;
+	struct device_node *np_phy;
+	struct extcon_dev *edev = NULL;
 	const char *name;
 
 	if (device_property_read_bool(dev, "extcon"))
@@ -470,17 +470,14 @@ static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
 	 * or OTG mode.
 	 */
 	np_phy = of_parse_phandle(dev->of_node, "phys", 0);
-	if (of_graph_is_present(np_phy))
-		np_conn = of_graph_get_remote_node(np_phy, -1, -1);
-	else
-		np_conn = NULL;
-
-	if (np_conn)
-		edev = extcon_find_edev_by_node(np_conn);
-	else
-		edev = NULL;
+	if (of_graph_is_present(np_phy)) {
+		struct device_node *np_conn;
 
-	of_node_put(np_conn);
+		np_conn = of_graph_get_remote_node(np_phy, -1, -1);
+		if (np_conn)
+			edev = extcon_find_edev_by_node(np_conn);
+		of_node_put(np_conn);
+	}
 	of_node_put(np_phy);
 
 	return edev;
-- 
2.29.2