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| author | Alan Stern <stern@rowland.harvard.edu> | 2012-05-14 19:48:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-14 21:50:22 +0200 |
| commit | 1996e6c572969a8cf6d7fa97eef621219acd94a9 (patch) | |
| tree | 4a6bcdd32202438d6f8a4671a936319c0292dbf3 /drivers/usb/host/ehci-hcd.c | |
| parent | USB: EHCI: improve full-speed isochronous scheduling routine (diff) | |
| download | linux-1996e6c572969a8cf6d7fa97eef621219acd94a9.tar.xz linux-1996e6c572969a8cf6d7fa97eef621219acd94a9.zip | |
USB: EHCI: work around bug in the Philips ISP1562 controller
This patch (as1556) works around a bug in the Philips ISP1562 EHCI
controller. Although the controller claims to support frame-list
lengths smaller than the default of 1024 for its periodic schedule, in
fact smaller values don't work. A new quirk flag is added to indicate
when the bug is present, and if it is then the schedule size is left
at the default value.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 5cb775b1802d..f644ba9529ed 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -639,7 +639,7 @@ static int ehci_init(struct usb_hcd *hcd) INIT_LIST_HEAD(&ehci->cached_itd_list); INIT_LIST_HEAD(&ehci->cached_sitd_list); - if (HCC_PGM_FRAMELISTLEN(hcc_params)) { + if (HCC_PGM_FRAMELISTLEN(hcc_params) && !ehci->sched_size_bug) { /* periodic schedule size can be smaller than default */ switch (EHCI_TUNE_FLS) { case 0: ehci->periodic_size = 1024; break; |