diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2012-10-01 10:32:15 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-22 11:10:24 -0700 |
| commit | 6a41b4d3fe8cd4cc95181516fc6fba7b1747a27c (patch) | |
| tree | 2b4dc08f94a67985f595d157c399774cee4e661a /drivers/usb/host/ohci-q.c | |
| parent | c44b225077bb1fb25ed5cd5c4f226897b91bedd4 (diff) | |
OHCI: implement new semantics for URB_ISO_ASAP
This patch (as1614) updates the isochronous scheduling in ohci-hcd to
match the new semantics for URB_ISO_ASAP. Testing revealed a hardware
bug in the way my OHCI controller handles expired isochronous TDs;
consequently the patch tries hard to avoid creating them (unlike the
ehci-hcd and uhci-hcd drivers).
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ohci-q.c')
| -rw-r--r-- | drivers/usb/host/ohci-q.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c index c5a1ea9145fa..177a213790d4 100644 --- a/drivers/usb/host/ohci-q.c +++ b/drivers/usb/host/ohci-q.c @@ -596,7 +596,6 @@ static void td_submit_urb ( urb_priv->ed->hwHeadP &= ~cpu_to_hc32 (ohci, ED_C); } - urb_priv->td_cnt = 0; list_add (&urb_priv->pending, &ohci->pending); if (data_len) @@ -672,7 +671,8 @@ static void td_submit_urb ( * we could often reduce the number of TDs here. */ case PIPE_ISOCHRONOUS: - for (cnt = 0; cnt < urb->number_of_packets; cnt++) { + for (cnt = urb_priv->td_cnt; cnt < urb->number_of_packets; + cnt++) { int frame = urb->start_frame; // FIXME scheduling should handle frame counter |