From: Manuel Lauss <manuel.lauss@xxxxxxxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/host/ehci-au1xxx.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/host/ehci-au1xxx.c b/drivers/usb/host/ehci-au1xxx.c
index e3a74e7..7a27b7c 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,
--
1.7.1
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