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USB: flush outstanding URBs when suspending

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This patch (as989) makes usbcore flush all outstanding URBs for each
device as the device is suspended.  This will be true even when
CONFIG_USB_SUSPEND is not enabled.

In addition, an extra can_submit flag is added to the usb_device
structure.  That flag will be turned off whenever a suspend request
has been received for the device, even if the device isn't actually
suspended because CONFIG_USB_SUSPEND isn't set.

It's no longer necessary to check for the device state being equal to
USB_STATE_SUSPENDED during URB submission; that check can be replaced
by a check of the can_submit flag.  This also permits us to remove
some questionable references to the deprecated power.power_state field.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2007-09-10 11:34:26 -04:00
committed by Greg Kroah-Hartman
parent 95cf82f99c
commit 6840d2555a
6 changed files with 17 additions and 12 deletions
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5
drivers/usb/core/hcd.c
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@ -1014,6 +1014,11 @@ int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)
goto done;
}
if (unlikely(!urb->dev->can_submit)) {
rc = -EHOSTUNREACH;
goto done;
}
/*
* Check the host controller's state and add the URB to the
* endpoint's queue.