linux-kernel - Re: [linux-usb-devel] 2.6.23-rc1-mm2 + cpufreq patch + hot-fixes -- [<f8ea528f>] usb_stor_scan_thread+0xbd/0x15a [usb

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Date:	Tue, 7 Aug 2007 00:26:36 +0900
From:	"Akinobu Mita" <akinobu.mita@...il.com>
To:	"Alan Stern" <stern@...land.harvard.edu>
Cc:	"Miles Lane" <miles.lane@...il.com>,
	"Andrew Morton" <akpm@...l.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"USB development list" <linux-usb-devel@...ts.sourceforge.net>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [linux-usb-devel] 2.6.23-rc1-mm2 + cpufreq patch + hot-fixes -- [<f8ea528f>] usb_stor_scan_thread+0xbd/0x15a [usb_storage]

2007/8/6, Alan Stern <stern@...land.harvard.edu>:
> On Sat, 4 Aug 2007, Miles Lane wrote:
>
> > Initializing USB Mass Storage driver...
> > usb-storage 4-3:1.0: usb_probe_interface
> > usb-storage 4-3:1.0: usb_probe_interface - got id
> > scsi2 : SCSI emulation for USB Mass Storage devices
> > usbcore: registered new interface driver usb-storage
> > usb-storage: device found at 2
> > usb-storage: waiting for device to settle before scanning
> > schedule_timeout: wrong timeout value f8ea51d2
> >  [<c01080ab>] show_trace_log_lvl+0x12/0x25
> >  [<c0108a9e>] show_trace+0xd/0x10
> >  [<c0108bac>] dump_stack+0x16/0x18
> >  [<c031e31e>] schedule_timeout+0x2c/0x8b
> >  [<f8ea528f>] usb_stor_scan_thread+0xbd/0x15a [usb_storage]
> >  [<c0139d64>] kthread+0x3b/0x63
> >  [<c0107c63>] kernel_thread_helper+0x7/0x10
> >  =======================
>
> Does this happen repeatably?
>
> Did you set usb-storage's delay_use parameter to something peculiar?

I also have same problem. It is caused by
http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc1/2.6.23-rc1-mm2/broken-out/freezer-introduce-freezer-firendly-waiting-macros.patch

The patch below may not be good fix. But it shows what is problem.

Index: 2.6-mm/include/linux/freezer.h
===================================================================
--- 2.6-mm.orig/include/linux/freezer.h
+++ 2.6-mm/include/linux/freezer.h
@@ -149,13 +149,13 @@ static inline void set_freezable(void)

 #define wait_event_freezable_timeout(wq, condition, timeout)		\
 ({									\
-	long __ret = timeout;						\
+	long ____ret = timeout;						\
 	do {								\
-		__ret = wait_event_interruptible_timeout(wq,		\
+		____ret = wait_event_interruptible_timeout(wq,		\
 				(condition) || freezing(current),	\
-				__ret); 				\
+				____ret); 				\
 	} while (try_to_freeze());					\
-	__ret;								\
+	____ret;							\
 })
 #else /* !CONFIG_PM_SLEEP */
 static inline int frozen(struct task_struct *p) { return 0; }
-
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