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authorAlan Stern <stern@rowland.harvard.edu>2012-09-29 00:01:34 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-22 19:57:43 +0400
commit98cae42d82fe9c9e2b5dacdf391edaa007e147e5 (patch)
tree1fc9be10a439d0557d673ca570b48dce3e56df79 /drivers/usb/host/ehci-pci.c
parentc3ee9b76aa93fbf59727e02fac9914c7355108f3 (diff)
downloadlinux-98cae42d82fe9c9e2b5dacdf391edaa007e147e5.tar.xz
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.c1
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;