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powerpc/usb: fix bug of CPU hang when missing USB PHY clock
authorShengzhou Liu <Shengzhou.Liu@freescale.com>
Wed, 22 Aug 2012 10:17:00 +0000 (18:17 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 5 Sep 2012 23:52:08 +0000 (16:52 -0700)
when missing USB PHY clock, kernel booting up will hang during USB
initialization. We should check USBGP[PHY_CLK_VALID] bit to avoid
CPU hanging in this case.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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