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author | Olof Johansson <olof@lixom.net> | 2012-09-05 15:35:48 -0700 |
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committer | Olof Johansson <olof@lixom.net> | 2012-09-05 15:35:48 -0700 |
commit | 1875962377574b4edb7b164001e3e341c25290d5 (patch) | |
tree | 374a5299403ec21e2d9a66a6548ce876a388b589 /drivers/usb/host/xhci-ring.c | |
parent | 5cbee140a28c2746449ae31e85738043ae4da927 (diff) | |
parent | c88a79a7789b2909ad1cf69ea2c9142030bbd6f4 (diff) | |
download | op-kernel-dev-1875962377574b4edb7b164001e3e341c25290d5.zip op-kernel-dev-1875962377574b4edb7b164001e3e341c25290d5.tar.gz |
Merge branch 'soc-core' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/dt
* 'soc-core' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: mach-shmobile: Add compilation support for dtbs using 'make dtbs'
+ sync to 3.6-rc3
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
-rw-r--r-- | drivers/usb/host/xhci-ring.c | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 8275645..643c2f3 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -145,29 +145,37 @@ static void next_trb(struct xhci_hcd *xhci, */ static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring) { - union xhci_trb *next; unsigned long long addr; ring->deq_updates++; - /* If this is not event ring, there is one more usable TRB */ + /* + * If this is not event ring, and the dequeue pointer + * is not on a link TRB, there is one more usable TRB + */ if (ring->type != TYPE_EVENT && !last_trb(xhci, ring, ring->deq_seg, ring->dequeue)) ring->num_trbs_free++; - next = ++(ring->dequeue); - /* Update the dequeue pointer further if that was a link TRB or we're at - * the end of an event ring segment (which doesn't have link TRBS) - */ - while (last_trb(xhci, ring, ring->deq_seg, next)) { - if (ring->type == TYPE_EVENT && last_trb_on_last_seg(xhci, - ring, ring->deq_seg, next)) { - ring->cycle_state = (ring->cycle_state ? 0 : 1); + do { + /* + * Update the dequeue pointer further if that was a link TRB or + * we're at the end of an event ring segment (which doesn't have + * link TRBS) + */ + if (last_trb(xhci, ring, ring->deq_seg, ring->dequeue)) { + if (ring->type == TYPE_EVENT && + last_trb_on_last_seg(xhci, ring, + ring->deq_seg, ring->dequeue)) { + ring->cycle_state = (ring->cycle_state ? 0 : 1); + } + ring->deq_seg = ring->deq_seg->next; + ring->dequeue = ring->deq_seg->trbs; + } else { + ring->dequeue++; } - ring->deq_seg = ring->deq_seg->next; - ring->dequeue = ring->deq_seg->trbs; - next = ring->dequeue; - } + } while (last_trb(xhci, ring, ring->deq_seg, ring->dequeue)); + addr = (unsigned long long) xhci_trb_virt_to_dma(ring->deq_seg, ring->dequeue); } @@ -2073,8 +2081,8 @@ static int handle_tx_event(struct xhci_hcd *xhci, if (xhci->quirks & XHCI_TRUST_TX_LENGTH) trb_comp_code = COMP_SHORT_TX; else - xhci_warn(xhci, "WARN Successful completion on short TX: " - "needs XHCI_TRUST_TX_LENGTH quirk?\n"); + xhci_warn_ratelimited(xhci, + "WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?\n"); case COMP_SHORT_TX: break; case COMP_STOP: |