USB: ehci: Elide I/O watchdog on NEC parts

I've been running with this patch on my Niagara2 boxes for some time
and have not seen any ill effects yet.  Maybe we can stash this into
the USB tree to get exposure for some time in -next and if anything
crops up we can simply revert?

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index ead5f4f2aa5a43ecf189000e9b0322888675d1a0..d120059bbbf7d54a42c3293b0b8387cece80f615 100644 (file)
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -109,6 +109,9 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
                return retval;
 
        switch (pdev->vendor) {
+       case PCI_VENDOR_ID_NEC:
+               ehci->need_io_watchdog = 0;
+               break;
        case PCI_VENDOR_ID_INTEL:
                ehci->need_io_watchdog = 0;
                if (pdev->device == 0x27cc) {