USB: EHCI: clear PHCD before resuming

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commit eab80de01c 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>

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Alek Du 2010-05-10 11:17:49 +08:00 • committed by Greg Kroah-Hartman

parent 068c984526

commit a9093288d3

1 changed files with 17 additions and 0 deletions

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drivers/usb/host/ehci-hub.c

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