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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2009-09-16 16:42:30 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2009-10-09 13:52:06 -0700
commite4ab05df573834b8c70d19db426b7d6286782c1d (patch)
treeaf8c7341677690d9317758d6f6738e9545d9b091
parent35f76e897d67fb62b4ec0be01fc0caaeb7f90108 (diff)
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>
-rw-r--r--drivers/usb/host/xhci-hcd.c6
1 files changed, 6 insertions, 0 deletions
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);