From 65bfd2967c906ca322a4bb69a285fe0de8916ac6 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 25 Nov 2008 16:39:18 -0500 Subject: USB: Enhance usage of pm_message_t This patch (as1177) modifies the USB core suspend and resume routines. The resume functions now will take a pm_message_t argument, so they will know what sort of resume is occurring. The new argument is also passed to the port suspend/resume and bus suspend/resume routines (although they don't use it for anything but debugging). In addition, special pm_message_t values are used for user-initiated, device-initiated (i.e., remote wakeup), and automatic suspend/resume. By testing these values, drivers can tell whether or not a particular suspend was an autosuspend. Unfortunately, they can't do the same for resumes -- not until the pm_message_t argument is also passed to the drivers' resume methods. That will require a bigger change. IMO, the whole Power Management framework should have been set up this way in the first place. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 2 +- drivers/usb/class/cdc-wdm.c | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/usb/class') diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index d50a99f70ae..00b47ea24f8 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1275,7 +1275,7 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message) struct acm *acm = usb_get_intfdata(intf); int cnt; - if (acm->dev->auto_pm) { + if (message.event & PM_EVENT_AUTO) { int b; spin_lock_irq(&acm->read_lock); diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c index 5a8ecc045e3..3771d6e6d0c 100644 --- a/drivers/usb/class/cdc-wdm.c +++ b/drivers/usb/class/cdc-wdm.c @@ -764,7 +764,8 @@ static int wdm_suspend(struct usb_interface *intf, pm_message_t message) mutex_lock(&desc->plock); #ifdef CONFIG_PM - if (interface_to_usbdev(desc->intf)->auto_pm && test_bit(WDM_IN_USE, &desc->flags)) { + if ((message.event & PM_EVENT_AUTO) && + test_bit(WDM_IN_USE, &desc->flags)) { rv = -EBUSY; } else { #endif -- cgit v1.2.3