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| author | David S. Miller <davem@davemloft.net> | 2012-07-19 11:17:30 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-19 11:17:30 -0700 |
| commit | abaa72d7fd9a20a67b62e6afa0e746e27851dc33 (patch) | |
| tree | ebe4134fcc93a6e205e6004b3e652d7a62281651 /drivers/usb/host/xhci-ring.c | |
| parent | 67da22d23fa6f3324e03bcd0580b914b2e4afbf3 (diff) | |
| parent | 3e4b9459fb0e149c6b74c9e89399a8fc39a92b44 (diff) | |
| download | linux-stable-abaa72d7fd9a20a67b62e6afa0e746e27851dc33.tar.gz linux-stable-abaa72d7fd9a20a67b62e6afa0e746e27851dc33.tar.bz2 linux-stable-abaa72d7fd9a20a67b62e6afa0e746e27851dc33.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 23b4aefd1036..8275645889da 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -885,6 +885,17 @@ static void update_ring_for_set_deq_completion(struct xhci_hcd *xhci, num_trbs_free_temp = ep_ring->num_trbs_free; dequeue_temp = ep_ring->dequeue; + /* If we get two back-to-back stalls, and the first stalled transfer + * ends just before a link TRB, the dequeue pointer will be left on + * the link TRB by the code in the while loop. So we have to update + * the dequeue pointer one segment further, or we'll jump off + * the segment into la-la-land. + */ + if (last_trb(xhci, ep_ring, ep_ring->deq_seg, ep_ring->dequeue)) { + ep_ring->deq_seg = ep_ring->deq_seg->next; + ep_ring->dequeue = ep_ring->deq_seg->trbs; + } + while (ep_ring->dequeue != dev->eps[ep_index].queued_deq_ptr) { /* We have more usable TRBs */ ep_ring->num_trbs_free++; |