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| author | Alan Stern <stern@rowland.harvard.edu> | 2008-05-20 16:58:29 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-05-29 13:59:03 -0700 |
| commit | 3a31155cfff0935e4b178f3dca733d2d60d2eb8d (patch) | |
| tree | d862628b222cd28232fcc5452e4d88919a45b3fd /drivers/usb/host/ehci-hub.c | |
| parent | a8e5177583e975fc1f7c621c93956f494df9b979 (diff) | |
| download | linux-3.10-3a31155cfff0935e4b178f3dca733d2d60d2eb8d.tar.gz linux-3.10-3a31155cfff0935e4b178f3dca733d2d60d2eb8d.tar.bz2 linux-3.10-3a31155cfff0935e4b178f3dca733d2d60d2eb8d.zip | |
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.c | 10 |
1 files changed, 10 insertions, 0 deletions
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; +} |