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Commit 55e5fdfa authored by Mark Lord's avatar Mark Lord Committed by Greg Kroah-Hartman
Browse files

USB: hub.c loops forever on resume from ram due to bluetooth 



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: default avatarMark Lord <mlord@pobox.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 8538f96a

drivers/usb/core/hub.c

+2 −1
Original line number Diff line number Diff line
@@ -403,9 +403,10 @@ static void hub_tt_kevent (struct work_struct *work) 
	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;