From 28c56ea1431421dec51b7b229369e991481453df Mon Sep 17 00:00:00 2001 From: Shengzhou Liu Date: Thu, 16 Feb 2012 18:02:20 +0800 Subject: powerpc/usb: fix bug of kernel hang when initializing usb If USB UTMI PHY is not enable, writing to portsc register will lead to kernel hang during boot up. Signed-off-by: Shengzhou Liu Reported-by: Benjamin Herrenschmidt Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-fsl.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/usb/host/ehci-fsl.c') diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index cd30ea4416a6..7a15c2235758 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -216,6 +216,8 @@ static void ehci_fsl_setup_phy(struct ehci_hcd *ehci, unsigned int port_offset) { u32 portsc; + struct usb_hcd *hcd = ehci_to_hcd(ehci); + void __iomem *non_ehci = hcd->regs; portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]); portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW); @@ -231,6 +233,8 @@ static void ehci_fsl_setup_phy(struct ehci_hcd *ehci, portsc |= PORT_PTS_PTW; /* fall through */ case FSL_USB2_PHY_UTMI: + /* enable UTMI PHY */ + setbits32(non_ehci + FSL_SOC_USB_CTRL, CTRL_UTMI_PHY_EN); portsc |= PORT_PTS_UTMI; break; case FSL_USB2_PHY_NONE: -- cgit v1.2.3