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| author | Alan Stern <stern@rowland.harvard.edu> | 2010-07-14 11:03:23 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 14:35:40 -0700 |
| commit | ae68a83bdc1971cb02fefc7a686ba6d077065e71 (patch) | |
| tree | e69a504dcc97339afe531db8ec9e36b80fd37d30 /drivers/usb/host/ehci-sched.c | |
| parent | 43b86af83da7db8b2c6d85ca970203950e5bad88 (diff) | |
| download | blackbird-op-linux-ae68a83bdc1971cb02fefc7a686ba6d077065e71.tar.gz blackbird-op-linux-ae68a83bdc1971cb02fefc7a686ba6d077065e71.zip | |
USB: EHCI: remove PCI assumption
This patch (as1405) fixes a small bug in ehci-hcd's isochronous
scheduler. Not all EHCI controllers are PCI, and the code shouldn't
assume that they are. Instead, introduce a special flag for
controllers which need to delay iso scheduling for full-speed devices
beyond the scheduling threshold.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Sarah Sharp <sarah.a.sharp@linux.intel.com>
CC: David Brownell <david-b@pacbell.net>
CC: stable <stable@kernel.org>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/host/ehci-sched.c')
| -rw-r--r-- | drivers/usb/host/ehci-sched.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index d640346f9b56..efadced4ae67 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -1399,7 +1399,6 @@ iso_stream_schedule ( int status; unsigned mod = ehci->periodic_size << 3; struct ehci_iso_sched *sched = urb->hcpriv; - struct pci_dev *pdev; if (sched->span > (mod - SCHEDULE_SLOP)) { ehci_dbg (ehci, "iso request %p too long\n", urb); @@ -1426,15 +1425,14 @@ iso_stream_schedule ( * slot in the schedule, implicitly assuming URB_ISO_ASAP. */ if (likely (!list_empty (&stream->td_list))) { - pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); start = stream->next_uframe; /* For high speed devices, allow scheduling within the - * isochronous scheduling threshold. For full speed devices, - * don't. (Work around for Intel ICH9 bug.) + * isochronous scheduling threshold. For full speed devices + * and Intel PCI-based controllers, don't (work around for + * Intel ICH9 bug). */ - if (!stream->highspeed && - pdev->vendor == PCI_VENDOR_ID_INTEL) + if (!stream->highspeed && ehci->fs_i_thresh) next = now + ehci->i_thresh; else next = now; |
