From: Sarah Sharp Date: Thu, 1 Dec 2011 22:50:30 +0000 (-0800) Subject: xhci: Better debugging for critical host errors. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9258c0b26b7d2e819b157ec394edaf7a5853cebb;p=linux-beck.git xhci: Better debugging for critical host errors. When a host controller gives a bad event TRB, we should print out the contents of the TRB as a warning so that users don't have to recompile their kernel to get information about what went wrong. Also, print out the event ring if they have xHCI debugging turned on, since previous events can often explain what happened before the bad TRB occurred. Signed-off-by: Sarah Sharp --- diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index f34a268c6ccd..b0a85459652e 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1933,6 +1933,15 @@ static int handle_tx_event(struct xhci_hcd *xhci, xdev = xhci->devs[slot_id]; if (!xdev) { xhci_err(xhci, "ERROR Transfer event pointed to bad slot\n"); + xhci_err(xhci, "@%016llx %08x %08x %08x %08x\n", + xhci_trb_virt_to_dma(xhci->event_ring->deq_seg, + xhci->event_ring->dequeue), + lower_32_bits(le64_to_cpu(event->buffer)), + upper_32_bits(le64_to_cpu(event->buffer)), + le32_to_cpu(event->transfer_len), + le32_to_cpu(event->flags)); + xhci_dbg(xhci, "Event ring:\n"); + xhci_debug_segment(xhci, xhci->event_ring->deq_seg); return -ENODEV; } @@ -1946,6 +1955,15 @@ static int handle_tx_event(struct xhci_hcd *xhci, EP_STATE_DISABLED) { xhci_err(xhci, "ERROR Transfer event for disabled endpoint " "or incorrect stream ring\n"); + xhci_err(xhci, "@%016llx %08x %08x %08x %08x\n", + xhci_trb_virt_to_dma(xhci->event_ring->deq_seg, + xhci->event_ring->dequeue), + lower_32_bits(le64_to_cpu(event->buffer)), + upper_32_bits(le64_to_cpu(event->buffer)), + le32_to_cpu(event->transfer_len), + le32_to_cpu(event->flags)); + xhci_dbg(xhci, "Event ring:\n"); + xhci_debug_segment(xhci, xhci->event_ring->deq_seg); return -ENODEV; }