diff options
| author | Sarah Sharp | 2009-09-17 01:42:30 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2009-10-09 22:52:06 +0200 |
| commit | e4ab05df573834b8c70d19db426b7d6286782c1d (patch) | |
| tree | af8c7341677690d9317758d6f6738e9545d9b091 /drivers/usb | |
| parent | USB: usbtmc: fix timeout increase (diff) | |
| download | kernel-qcow2-linux-e4ab05df573834b8c70d19db426b7d6286782c1d.tar.gz kernel-qcow2-linux-e4ab05df573834b8c70d19db426b7d6286782c1d.tar.xz kernel-qcow2-linux-e4ab05df573834b8c70d19db426b7d6286782c1d.zip | |
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-hcd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c index 99911e727e0b..8719a3f6851d 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); |