From ee4ecb8ac63a5792bec448037d4b82ec4144f94b Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Fri, 27 Nov 2009 15:17:59 +0100 Subject: USB: work around for EHCI with quirky periodic schedules a quirky chipset needs periodic schedules to run for a minimum time before they can be disabled again. This enforces the requirement with a time stamp and a calculated delay Signed-off-by: Oliver Neukum Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-pci.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/usb/host/ehci-pci.c') diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 378861b..ead5f4f 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -111,6 +111,10 @@ static int ehci_pci_setup(struct usb_hcd *hcd) switch (pdev->vendor) { case PCI_VENDOR_ID_INTEL: ehci->need_io_watchdog = 0; + if (pdev->device == 0x27cc) { + ehci->broken_periodic = 1; + ehci_info(ehci, "using broken periodic workaround\n"); + } break; case PCI_VENDOR_ID_TDI: if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) { -- cgit v1.1