This is a note to let you know that I've just added the patch titled
Subject: USB: hub.c loops forever on resume from ram due to bluetooth
to my gregkh-2.6 tree. Its filename is
usb-hub.c-loops-forever-on-resume-from-ram-due-to-bluetooth.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From [email protected] Mon May 14 16:48:14 2007
From: Mark Lord <[email protected]>
Date: Mon, 14 May 2007 19:48:02 -0400
Subject: USB: hub.c loops forever on resume from ram due to bluetooth
To: Greg KH <[email protected]>
Cc: Linux Kernel <[email protected]>, Andrew Morton <[email protected]>, [email protected]
Message-ID: <[email protected]>
Okay, found it. The root cause here was a missing CONFIG_USB_SUSPEND=y,
which means the hci_usb device never got marked as USB_STATE_SUSPENDED,
which then caused the loop to go on forever.
The system works fine now with CONFIG_USB_SUSPEND=y in the .config.
Here's the patch to prevent future lockups for this or other causes.
I no longer need it, but it does still seem a good idea.
Signed-off-by: Mark Lord <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/core/hub.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -403,9 +403,10 @@ static void hub_tt_kevent (struct work_s
struct usb_hub *hub =
container_of(work, struct usb_hub, tt.kevent);
unsigned long flags;
+ int limit = 100;
spin_lock_irqsave (&hub->tt.lock, flags);
- while (!list_empty (&hub->tt.clear_list)) {
+ while (--limit && !list_empty (&hub->tt.clear_list)) {
struct list_head *temp;
struct usb_tt_clear *clear;
struct usb_device *hdev = hub->hdev;
Patches currently in gregkh-2.6 which might be from [email protected] are
usb/usb-hub.c-loops-forever-on-resume-from-ram-due-to-bluetooth.patch
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