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| author |   Alan Stern <stern@rowland.harvard.edu> | 2012-09-28 16:01:34 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-22 08:57:43 -0700 |
| commit | 98cae42d82fe9c9e2b5dacdf391edaa007e147e5 (patch) | |
| tree | 1fc9be10a439d0557d673ca570b48dce3e56df79 /drivers/usb/host/ehci-pci.c | |
| parent | EHCI: improved logic for isochronous scheduling (diff) | |
| download | linux-dev-98cae42d82fe9c9e2b5dacdf391edaa007e147e5.tar.xz linux-dev-98cae42d82fe9c9e2b5dacdf391edaa007e147e5.zip | |
EHCI: use the isochronous scheduling threshold
This patch (as1609) changes the way ehci-hcd uses the "Isochronous
Scheduling Threshold" in its calculations. Until now the code has
ignored the threshold except for certain Intel PCI-based controllers.
This violates the EHCI spec.
The new code takes the threshold into account always, removing the
need for the fs_i_thresh quirk flag. In addition it implements the
"full frame cache" setting more efficiently, moving forward only as
far as the next frame boundary instead of always moving forward 8
microframes.
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-pci.c')
| -rw-r--r-- | drivers/usb/host/ehci-pci.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 2cb7d370c4ef..d1407f8d42b1 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -103,7 +103,6 @@ static int ehci_pci_setup(struct usb_hcd *hcd) } break; case PCI_VENDOR_ID_INTEL: - ehci->fs_i_thresh = 1; if (pdev->device == PCI_DEVICE_ID_INTEL_CE4100_USB) hcd->has_tt = 1; break; |