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powerpc/usb: fix issue of CPU halt when missing USB PHY clock
authorShengzhou Liu <Shengzhou.Liu@freescale.com>
Thu, 2 Feb 2012 03:23:14 +0000 (11:23 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 2 Feb 2012 20:46:36 +0000 (12:46 -0800)
when missing USB PHY clock, kernel booting up will halt during USB
initialization. We should check USBGP[PHY_CLK_VALID] bit to avoid
CPU hang 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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