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 <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent 8538f96a
......@@ -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;
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