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USB: xhci: Stop debugging polling loop when HC dies. 

If the host controller card is removed from the system, stop the timer
function to debug the xHCI rings.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Sharp 2009-09-16 16:42:30 -07:00 committed by Greg Kroah-Hartman
parent 35f76e897d
commit e4ab05df57
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/host/xhci-hcd.c
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@ -335,6 +335,12 @@ void xhci_event_ring_work(unsigned long arg)
spin_lock_irqsave(&xhci->lock, flags);
temp = xhci_readl(xhci, &xhci->op_regs->status);
xhci_dbg(xhci, "op reg status = 0x%x\n", temp);
if (temp == 0xffffffff) {
xhci_dbg(xhci, "HW died, polling stopped.\n");
spin_unlock_irqrestore(&xhci->lock, flags);
return;
}
temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp);
xhci_dbg(xhci, "No-op commands handled = %d\n", xhci->noops_handled);