From 3a31155cfff0935e4b178f3dca733d2d60d2eb8d Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 20 May 2008 16:58:29 -0400 Subject: USB: EHCI: suppress unwanted error messages 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 CC: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-hub.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/usb/host/ehci-hub.c') diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 382587c4457..d613dc9e9c0 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -875,3 +875,13 @@ static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) set_owner(ehci, --portnum, PORT_OWNER); } +static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + u32 __iomem *reg; + + if (ehci_is_TDI(ehci)) + return 0; + reg = &ehci->regs->port_status[portnum - 1]; + return ehci_readl(ehci, reg) & PORT_OWNER; +} -- cgit v1.2.3