USB: EHCI: work around bug in the Philips ISP1562 controller
authorAlan Stern <stern@rowland.harvard.edu>
Mon, 14 May 2012 17:48:16 +0000 (13:48 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 14 May 2012 19:50:22 +0000 (12:50 -0700)
commit1996e6c572969a8cf6d7fa97eef621219acd94a9
tree4a6bcdd32202438d6f8a4671a936319c0292dbf3
parent65b8e5cbdddc86474372bdb48dc233b06710a576
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>
drivers/usb/host/ehci-hcd.c
drivers/usb/host/ehci-pci.c
drivers/usb/host/ehci.h