diff options
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 173c39c76489..821b7b4709de 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -864,9 +864,11 @@ static struct xhci_segment *trb_in_td( cur_seg = start_seg; do { + if (start_dma == 0) + return 0; /* We may get an event for a Link TRB in the middle of a TD */ end_seg_dma = xhci_trb_virt_to_dma(cur_seg, - &start_seg->trbs[TRBS_PER_SEGMENT - 1]); + &cur_seg->trbs[TRBS_PER_SEGMENT - 1]); /* If the end TRB isn't in this segment, this is set to 0 */ end_trb_dma = xhci_trb_virt_to_dma(cur_seg, end_trb); @@ -893,8 +895,9 @@ static struct xhci_segment *trb_in_td( } cur_seg = cur_seg->next; start_dma = xhci_trb_virt_to_dma(cur_seg, &cur_seg->trbs[0]); - } while (1); + } while (cur_seg != start_seg); + return 0; } /* |