[U-Boot] [PATCH 2/3] usb: workaround non-working keyboards.

[Simon Glass]

From: Vincent Palatin <vpalatin at chromium.org>

If the USB keyboard is not answering properly the first request on its
interrupt endpoint, just skip it and try the next one.

This workarounds an issue with a wireless mouse dongle which presents
itself both as a keyboard and a mouse but has a non-functional keyboard
interface.

Signed-off-by: Vincent Palatin <vpalatin at chromium.org>
(cherry picked from commit 012bbf0ce0301be2482857e3f03b481dd15c2340)
Rebased to upstream/master:
Signed-off-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Stefan Reinauer <reinauer at chromium.org>
Tested-by: Vincent Palatin <vpalatin at chromium.org>
---
 common/usb_kbd.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 188763d..3174b5e 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -461,8 +461,13 @@ static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
 	usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
 
 	debug("USB KBD: enable interrupt pipe...\n");
-	usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp,
-				ep->bInterval);
+	if (usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp,
+			       ep->bInterval) < 0) {
+		printf("Failed to get keyboard state from device %04x:%04x\n",
+		       dev->descriptor.idVendor, dev->descriptor.idProduct);
+		/* Abort, we don't want to use that non-functional keyboard. */
+		return 0;
+	}
 
 	/* Success. */
 	return 1;
-- 
1.8.2.1