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USB: EHCI: suppress unwanted error messages

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This patch (as1096) fixes an annoying problem: When a full-speed or
low-speed device is plugged into an EHCI controller, it fails to
enumerate at high speed and then is handed over to the companion
controller.  But usbcore logs a misleading and unwanted error message
when the high-speed enumeration fails.

The patch adds a new HCD method, port_handed_over, which asks whether
a port has been handed over to a companion controller.  If it has, the
error message is suppressed.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2008-05-20 16:58:29 -04:00 • committed by Greg Kroah-Hartman
parent a8e5177583
commit 3a31155cff
11 changed files with 25 additions and 1 deletions
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6
drivers/usb/core/hub.c
View file

@ -2753,7 +2753,11 @@ loop:
if ((status == -ENOTCONN) || (status == -ENOTSUPP))
break;
}
dev_err(hub_dev, "unable to enumerate USB device on port %d\n", port1);
if (hub->hdev->parent ||
!hcd->driver->port_handed_over ||
!(hcd->driver->port_handed_over)(hcd, port1))
dev_err(hub_dev, "unable to enumerate USB device on port %d\n",
port1);
done:
hub_port_disable(hub, port1, 1);