[RFC PATCH 3/3] common/usb.c: Work around keyboard reporting "USB device not accepting new address"

[Jason Wessel]

When resetting the rpi3 board sometimes it will display:
     USB device not accepting new address (error=0)

After the message appears, the usb keyboard will not work.  It seems
that the configuration actually did succeed however.  Checking the
device status for a return code of zero and continuing allows the usb
keyboard and other usb devices to work function.

Signed-off-by: Jason Wessel <jason.wessel at windriver.com>
---
 common/usb.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/common/usb.c b/common/usb.c
index aad13fd9c5..2f7f205444 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -1054,11 +1054,13 @@ static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
 	dev->devnum = addr;
 
 	err = usb_set_address(dev); /* set address */
-
-	if (err < 0) {
-		printf("\n      USB device not accepting new address " \
+	if (err < 0)
+		debug("\n       usb_set_address return < 0\n");
+	if (err < 0 && dev->status != 0) {
+		printf("\n      USB device not accepting new address "	\
 			"(error=%lX)\n", dev->status);
-		return err;
+		if (dev->status != 0)
+			return err;
 	}
 
 	mdelay(10);	/* Let the SET_ADDRESS settle */
-- 
2.17.1