Re: Regression: USB is nfg after suspend/resume(RAM) cycle on Intel chipset

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Mark Lord wrote:
Linus Torvalds wrote:
..
There's a different (but related to all the same freezer problems) patch by Rafael Wysocki <[email protected]>:
 Re: [RFC][PATCH][EXPERIMENTAL] Make kernel threads nonfreezable by
default
    Message-Id: <[email protected]>
I'll hunt for Rafael's patch next.
Mmm.. Rafael's patch appears to be part of a large series of 15 patches,
and it's not totally clear to me how to test just that part of it,
so I think I'll leave things as is (working!) for now.

Here's my current fix:

-- snip --

Regarding commit 7ed92f1a149dddc3cb537ccd7441e98adac12c3e
"USB: make the autosuspend workqueue thread freezable":

This commit causes USB lockups on resume from Suspend-to-RAM
on my Core2duo notebook.  Applying the patch below to revert
the commit fixes the problem for me in 2.6.22-rc3.

Signed-off-by:  Mark Lord <[email protected]>
---
--- b0rken/drivers/usb/core/usb.c	2007-05-29 13:32:32.000000000 -0400
+++ linux/drivers/usb/core/usb.c	2007-05-29 13:27:10.000000000 -0400
@@ -205,11 +205,7 @@

static int ksuspend_usb_init(void)
{
-	/* 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");
+	ksuspend_usb_wq = create_singlethread_workqueue("ksuspend_usbd");
	if (!ksuspend_usb_wq)
		return -ENOMEM;
	return 0;
-
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