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USB: EHCI: clear PHCD before resuming
authorAlek Du <alek.du@intel.com>
Mon, 10 May 2010 03:17:49 +0000 (11:17 +0800)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 5 Jul 2010 18:10:37 +0000 (11:10 -0700)
commited158fbaee230d8652efb1e16a4e74d7ee2d13e1
tree958137852957a6e13f8ff3e953fd10534824ee85tree | snapshot
parent488abbe8b16389225006300abd34b0105ab9147acommit | diff
USB: EHCI: clear PHCD before resuming

commit eab80de01cb398419ef3305f35abcb367c647c8b upstream.

This is a bug fix for PHCD (phy clock disable) low power feature:
After PHCD is set, any write to PORTSC register is illegal, so when
resume ports, clear PHCD bit first.

Signed-off-by: Alek Du <alek.du@intel.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/host/ehci-hub.c diff | blob | history
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