On Tue, 13 Dec 2005, Greg KH wrote:
> Alan, I'm starting to get some complaints about this issue (almost no
> usb drivers have a suspend/resume function, nor should they be required
> to.)
>
> Mind if I add the patch below to the tree?
Feel free.
This patch (as618) changes usbcore to prevent derailing the suspend/resume
sequence when a USB driver doesn't include support for it. This is a
workaround rather than a true fix; the core needs to be changed so that
URB submissions from suspended drivers can be refused and outstanding URBs
cancelled.
Alan Stern
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Index: linux-2.6.15-rc3/drivers/usb/core/usb.c
===================================================================
--- linux-2.6.15-rc3.orig/drivers/usb/core/usb.c
+++ linux-2.6.15-rc3/drivers/usb/core/usb.c
@@ -1414,8 +1414,10 @@ static int usb_generic_suspend(struct de
}
if ((dev->driver == NULL) ||
- (dev->driver_data == &usb_generic_driver_data))
+ (dev->driver_data == &usb_generic_driver_data)) {
+ dev->power.power_state.event = PM_EVENT_FREEZE;
return 0;
+ }
intf = to_usb_interface(dev);
driver = to_usb_driver(dev->driver);
@@ -1433,6 +1435,7 @@ static int usb_generic_suspend(struct de
} else {
// FIXME else if there's no suspend method, disconnect...
dev_warn(dev, "no %s?\n", "suspend");
+ mark_quiesced(intf);
status = 0;
}
return status;
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