[bug report] MIPS: Lemote 2F: Add basic CS5536 VSM support

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

[ This code is 8 years old, so it's possible no one has this hardware
  any more.  -dan ]

Hello Wu Zhangjin,

The patch 22c21003a91b: "MIPS: Lemote 2F: Add basic CS5536 VSM
support" from Nov 10, 2009, leads to the following static checker
warning:

	./arch/mips/loongson64/common/cs5536/cs5536_ohci.c:141 (null)()
	warn: masked condition '(lo & 3840) == 11' is always false.

arch/mips/loongson64/common/cs5536/cs5536_ohci.c
   135          case PCI_INTERRUPT_LINE:
   136                  conf_data =
   137                      CFG_PCI_INTERRUPT_LINE(PCI_DEFAULT_PIN, CS5536_USB_INTR);
   138                  break;
   139          case PCI_OHCI_INT_REG:
   140                  _rdmsr(DIVIL_MSR_REG(PIC_YSEL_LOW), &hi, &lo);
   141                  if ((lo & 0x00000f00) == CS5536_USB_INTR)

CS5536_USB_INTR is 11 so this condition can't possibly be true.  I'm not
sure what was intended.

   142                          conf_data = 1;
   143                  break;
   144          default:
   145                  break;
   146          }
   147  
   148          return conf_data;

regards,
dan carpenter