From: Peter Chen <peter.chen@freescale.com>
Date: Mon, 12 Aug 2013 01:22:49 +0000 (+0800)
Subject: usb: chipidea: udc: otg_set_peripheral is useless for some chipidea users
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=29cf0d156a6b4089b53bff77fa40a13188af61de;p=karo-tx-linux.git

usb: chipidea: udc: otg_set_peripheral is useless for some chipidea users

It is useless at below cases:
- If we implement both usb host and device at chipidea driver.
- If we don't need phy->otg.

Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
---

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index e475fcda1d68..116c76203884 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1805,7 +1805,12 @@ static int udc_start(struct ci_hdrc *ci)
 	if (ci->transceiver) {
 		retval = otg_set_peripheral(ci->transceiver->otg,
 						&ci->gadget);
-		if (retval)
+		/*
+		 * If we implement all USB functions using chipidea drivers,
+		 * it doesn't need to call above API, meanwhile, if we only
+		 * use gadget function, calling above API is useless.
+		 */
+		if (retval && retval != -ENOTSUPP)
 			goto put_transceiver;
 	}