From e4ab05df573834b8c70d19db426b7d6286782c1d Mon Sep 17 00:00:00 2001 From: Sarah Sharp Date: Wed, 16 Sep 2009 16:42:30 -0700 Subject: 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hcd.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c index 99911e727e0..8719a3f6851 100644 --- a/drivers/usb/host/xhci-hcd.c +++ b/drivers/usb/host/xhci-hcd.c @@ -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); -- cgit v1.2.3