forked from Minki/linux
USB: ehci-au1xxx does not need EHCI IO watchdog
I've been running variations of this patch for well over a year now; my usual zoo of test devices didn't trigger any ill effects even under heavy load. As a nice sideeffect idle-wakeups are reduced from 20/s to about 2/s (EHCI hub with mouse and kbd). Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -69,6 +69,15 @@ static void au1xxx_stop_ehc(void)
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au_sync();
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}
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static int au1xxx_ehci_setup(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int ret = ehci_init(hcd);
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ehci->need_io_watchdog = 0;
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return ret;
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}
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static const struct hc_driver ehci_au1xxx_hc_driver = {
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.description = hcd_name,
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.product_desc = "Au1xxx EHCI",
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@ -86,7 +95,7 @@ static const struct hc_driver ehci_au1xxx_hc_driver = {
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* FIXME -- ehci_init() doesn't do enough here.
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* See ehci-ppc-soc for a complete implementation.
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*/
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.reset = ehci_init,
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.reset = au1xxx_ehci_setup,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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