aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/host/ehci-hub.c
diff options
context:
space:
mode:
authorAlan Stern <stern@rowland.harvard.edu>2008-05-20 16:58:29 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-05-29 13:59:03 -0700
commit3a31155cfff0935e4b178f3dca733d2d60d2eb8d (patch)
treed862628b222cd28232fcc5452e4d88919a45b3fd /drivers/usb/host/ehci-hub.c
parenta8e5177583e975fc1f7c621c93956f494df9b979 (diff)
downloadlinux-linaro-stable-3a31155cfff0935e4b178f3dca733d2d60d2eb8d.tar.gz
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 <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
-rw-r--r--drivers/usb/host/ehci-hub.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 382587c4457c..d613dc9e9c05 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;
+}