4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Paul Burton <[email protected]> [ Upstream commit cd87668d601f622e0ebcfea4f78d116d5f572f4d ] The PCI_OHCI_INT_REG case in pci_ohci_read_reg() contains the following if statement: if ((lo & 0x00000f00) == CS5536_USB_INTR) CS5536_USB_INTR expands to the constant 11, which gives us the following condition which can never evaluate true: if ((lo & 0xf00) == 11) At least when using GCC 8.1.0 this falls foul of the tautoligcal-compare warning, and since the code is built with the -Werror flag the build fails. Fix this by shifting lo right by 8 bits in order to match the corresponding PCI_OHCI_INT_REG case in pci_ohci_write_reg(). Signed-off-by: Paul Burton <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/19861/ Cc: Huacai Chen <[email protected]> Cc: James Hogan <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: [email protected] Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/mips/loongson64/common/cs5536/cs5536_ohci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/mips/loongson64/common/cs5536/cs5536_ohci.c +++ b/arch/mips/loongson64/common/cs5536/cs5536_ohci.c @@ -138,7 +138,7 @@ u32 pci_ohci_read_reg(int reg) break; case PCI_OHCI_INT_REG: _rdmsr(DIVIL_MSR_REG(PIC_YSEL_LOW), &hi, &lo); - if ((lo & 0x00000f00) == CS5536_USB_INTR) + if (((lo >> PIC_YSEL_LOW_USB_SHIFT) & 0xf) == CS5536_USB_INTR) conf_data = 1; break; default:
