diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index f479f73711ac..6860e9f097bb 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -2014,7 +2014,7 @@ static void xhci_handle_event(struct xhci_hcd *xhci) irqreturn_t xhci_irq(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); - u32 status, irq_pending; + u32 status; union xhci_trb *trb; u64 temp_64; union xhci_trb *event_ring_deq; @@ -2024,17 +2024,15 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd) trb = xhci->event_ring->dequeue; /* Check if the xHC generated the interrupt, or the irq is shared */ status = xhci_readl(xhci, &xhci->op_regs->status); - irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending); - if (status == 0xffffffff && irq_pending == 0xffffffff) + if (status == 0xffffffff) goto hw_died; - if (!(status & STS_EINT) && !ER_IRQ_PENDING(irq_pending)) { + if (!(status & STS_EINT)) { spin_unlock(&xhci->lock); xhci_warn(xhci, "Spurious interrupt.\n"); return IRQ_NONE; } xhci_dbg(xhci, "op reg status = %08x\n", status); - xhci_dbg(xhci, "ir set irq_pending = %08x\n", irq_pending); xhci_dbg(xhci, "Event ring dequeue ptr:\n"); xhci_dbg(xhci, "@%llx %08x %08x %08x %08x\n", (unsigned long long) @@ -2063,9 +2061,13 @@ hw_died: /* FIXME when MSI-X is supported and there are multiple vectors */ /* Clear the MSI-X event interrupt status */ - /* Acknowledge the interrupt */ - irq_pending |= 0x3; - xhci_writel(xhci, irq_pending, &xhci->ir_set->irq_pending); + if (hcd->irq != -1) { + u32 irq_pending; + /* Acknowledge the PCI interrupt */ + irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending); + irq_pending |= 0x3; + xhci_writel(xhci, irq_pending, &xhci->ir_set->irq_pending); + } if (xhci->xhc_state & XHCI_STATE_DYING) { xhci_dbg(xhci, "xHCI dying, ignoring interrupt. " |