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| author | Alan Stern <stern@rowland.harvard.edu> | 2013-03-22 21:31:29 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-26 00:35:05 +0400 |
| commit | 7655e3160c78a18c2ecf7bf4dee0bbfe58575c7f (patch) | |
| tree | bf32c4068914e6c3054ba35dc003a9818c0dfc56 /drivers/usb/host/ehci-hcd.c | |
| parent | 7bc782d73c7db042ecc965866b8c1c2b7d6e93d6 (diff) | |
| download | linux-7655e3160c78a18c2ecf7bf4dee0bbfe58575c7f.tar.xz | |
USB: EHCI: consolidate code in ehci_urb_dequeue()
This patch (as1668) consolidates two nearly identical code paths in
ehci_urb_dequeue(). The test for !qh can be removed because it will
never succeed; the fact that usb_hcd_check_unlink_urb() returned 0
means that urb must be queued and therefore urb->hcpriv must point to
a QH.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 48 |
1 files changed, 11 insertions, 37 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 93f4cd75845e..87fe3daaa092 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -896,17 +896,21 @@ static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) if (rc) goto done; - switch (usb_pipetype (urb->pipe)) { - // case PIPE_CONTROL: - // case PIPE_BULK: - default: + if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { + /* + * We don't expedite dequeue for isochronous URBs. + * Just wait until they complete normally or their + * time slot expires. + */ + } else { qh = (struct ehci_qh *) urb->hcpriv; - if (!qh) - break; qh->exception = 1; switch (qh->qh_state) { case QH_STATE_LINKED: - start_unlink_async(ehci, qh); + if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) + start_unlink_intr(ehci, qh); + else + start_unlink_async(ehci, qh); break; case QH_STATE_COMPLETING: qh->dequeue_during_giveback = 1; @@ -920,36 +924,6 @@ static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) qh_completions(ehci, qh); break; } - break; - - case PIPE_INTERRUPT: - qh = (struct ehci_qh *) urb->hcpriv; - if (!qh) - break; - qh->exception = 1; - switch (qh->qh_state) { - case QH_STATE_LINKED: - start_unlink_intr(ehci, qh); - break; - case QH_STATE_COMPLETING: - qh->dequeue_during_giveback = 1; - break; - case QH_STATE_IDLE: - qh_completions (ehci, qh); - break; - default: - ehci_dbg (ehci, "bogus qh %p state %d\n", - qh, qh->qh_state); - goto done; - } - break; - - case PIPE_ISOCHRONOUS: - // itd or sitd ... - - // wait till next completion, do it then. - // completion irqs can wait up to 1024 msec, - break; } done: spin_unlock_irqrestore (&ehci->lock, flags); |