usb: workaround non-working keyboards.

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@chromium.org>
(cherry picked from commit 012bbf0ce0301be2482857e3f03b481dd15c2340)
Rebased to upstream/master:
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>

diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 188763d605525202a07ca62e181f18e2f648b8bc..3174b5e1bf4b4a7b827edf825725f6f95c24cf9e 100644 (file)
--- 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;