3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> commit 997ff893603c6455da4c5e26ba1d0f81adfecdfc upstream. HP's virtual UHCI host controller takes a long time to suspend (several hundred microseconds), even when no devices are attached. This provokes a warning message from uhci-hcd in the auto-stop case. To prevent this from happening, this patch adds a test to avoid performing an auto-stop when the wait_for_hp quirk flag is set. The controller will still suspend through the normal runtime PM mechanism. And since that pathway includes a 1-ms delay, the slowness of the virtual hardware won't matter. Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Reported-and-tested-by: ZhenHua <zhen-hual@xxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/host/uhci-hub.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/usb/host/uhci-hub.c +++ b/drivers/usb/host/uhci-hub.c @@ -222,7 +222,8 @@ static int uhci_hub_status_data(struct u /* auto-stop if nothing connected for 1 second */ if (any_ports_active(uhci)) uhci->rh_state = UHCI_RH_RUNNING; - else if (time_after_eq(jiffies, uhci->auto_stop_time)) + else if (time_after_eq(jiffies, uhci->auto_stop_time) && + !uhci->wait_for_hp) suspend_rh(uhci, UHCI_RH_AUTO_STOPPED); break; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html