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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2009-07-27 12:04:01 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2009-07-28 14:31:12 -0700
commitfcf8f576beafb8c5db8aee8a73eb73763fa7b0ad (patch)
tree43251e12846cc8b974348c67bba0c4e28c309c20 /drivers/usb/host
parentd3512f63494678dc58e44a20c56278718fd58969 (diff)
USB: xhci: Check if the host controller died in IRQ handler.
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/host')
-rw-r--r--drivers/usb/host/xhci-hcd.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c
index 8c3a074a95cd..008326d5bc52 100644
--- a/drivers/usb/host/xhci-hcd.c
+++ b/drivers/usb/host/xhci-hcd.c
@@ -277,6 +277,9 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
/* Check if the xHC generated the interrupt, or the irq is shared */
temp = xhci_readl(xhci, &xhci->op_regs->status);
temp2 = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+ if (temp == 0xffffffff && temp2 == 0xffffffff)
+ goto hw_died;
+
if (!(temp & STS_EINT) && !ER_IRQ_PENDING(temp2)) {
spin_unlock(&xhci->lock);
return IRQ_NONE;
@@ -294,6 +297,7 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
if (temp & STS_FATAL) {
xhci_warn(xhci, "WARNING: Host System Error\n");
xhci_halt(xhci);
+hw_died:
xhci_to_hcd(xhci)->state = HC_STATE_HALT;
spin_unlock(&xhci->lock);
return -ESHUTDOWN;