This patch (as881b) makes the ksuspend_usb_wq workqueue freezable. We
don't want a rogue workqueue thread running around, unexpectedly
suspending or resuming USB devices in the middle of a system sleep
transition.
This fixes Bugzilla #8498.
Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
---
Greg:
Please revert the existing
usb-make-the-autosuspend-workqueue-thread-freezable.patch
and apply this one in its place. And don't forget to send it on to
Linus soon!
Alan Stern
Index: 2.6.22-rc2/drivers/usb/core/usb.c
===================================================================
--- 2.6.22-rc2.orig/drivers/usb/core/usb.c
+++ 2.6.22-rc2/drivers/usb/core/usb.c
@@ -205,7 +205,11 @@ struct device_type usb_device_type = {
static int ksuspend_usb_init(void)
{
- ksuspend_usb_wq = create_singlethread_workqueue("ksuspend_usbd");
+ /* This workqueue is supposed to be both freezable and
+ * singlethreaded. Its job doesn't justify running on more
+ * than one CPU.
+ */
+ ksuspend_usb_wq = create_freezeable_workqueue("ksuspend_usbd");
if (!ksuspend_usb_wq)
return -ENOMEM;
return 0;
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