From: Alan Stern Date: Mon, 10 Sep 2007 15:31:43 +0000 (-0400) Subject: USB: move decision to ignore FREEZE events X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5ad4f71e2f19a06f738463da1f09ea7fda3a3db2;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git USB: move decision to ignore FREEZE events This patch (as987) changes the way FREEZE and PRETHAW suspend events are handled in usbcore. The decision about whether or not to ignore them for non-root devices is pushed down into the USB-device driver, instead of being made in the core code. This is appropriate, since devices exported to a virtualized guest or over a network may indeed need to handle these types of suspend, even though normal devices don't. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 8da4801bb922..ca43a6f824ab 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -1088,15 +1088,8 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg) break; } } - if (status == 0) { - - /* Non-root devices don't need to do anything for FREEZE - * or PRETHAW. */ - if (udev->parent && (msg.event == PM_EVENT_FREEZE || - msg.event == PM_EVENT_PRETHAW)) - goto done; + if (status == 0) status = usb_suspend_device(udev, msg); - } /* If the suspend failed, resume interfaces that did get suspended */ if (status != 0) { diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c index 9148b69785c5..c1cb94e9f242 100644 --- a/drivers/usb/core/generic.c +++ b/drivers/usb/core/generic.c @@ -206,8 +206,13 @@ static int generic_suspend(struct usb_device *udev, pm_message_t msg) */ if (!udev->parent) rc = hcd_bus_suspend(udev); + + /* Non-root devices don't need to do anything for FREEZE or PRETHAW */ + else if (msg.event == PM_EVENT_FREEZE || msg.event == PM_EVENT_PRETHAW) + rc = 0; else rc = usb_port_suspend(udev); + return rc; }