From: Manuel Lauss Date: Mon, 8 Mar 2010 19:43:32 +0000 (+0100) Subject: USB: ehci-au1xxx does not need EHCI IO watchdog X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9757de384451a606af8c722213cb973192cbbd1b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/ehci-au1xxx.c b/drivers/usb/host/ehci-au1xxx.c index e3a74e75e822..7a27b7c4ee84 100644 --- a/drivers/usb/host/ehci-au1xxx.c +++ b/drivers/usb/host/ehci-au1xxx.c @@ -69,6 +69,15 @@ static void au1xxx_stop_ehc(void) au_sync(); } +static int au1xxx_ehci_setup(struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + int ret = ehci_init(hcd); + + ehci->need_io_watchdog = 0; + return ret; +} + static const struct hc_driver ehci_au1xxx_hc_driver = { .description = hcd_name, .product_desc = "Au1xxx EHCI", @@ -86,7 +95,7 @@ static const struct hc_driver ehci_au1xxx_hc_driver = { * FIXME -- ehci_init() doesn't do enough here. * See ehci-ppc-soc for a complete implementation. */ - .reset = ehci_init, + .reset = au1xxx_ehci_setup, .start = ehci_run, .stop = ehci_stop, .shutdown = ehci_shutdown,