| Message ID | 20170905072004.3959082-2-arnd@arndb.de (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c index d7f4c29aed96..f2df9c2266b9 100644 --- a/drivers/pci/host/pcie-iproc.c +++ b/drivers/pci/host/pcie-iproc.c @@ -528,7 +528,7 @@ static int iproc_pcie_config_read(struct pci_bus *bus, unsigned int devfn, return ret; /* Don't advertise CRS SV support */ - if ((where & ~0x3) == PCI_EXP_CAP + PCI_EXP_RTCAP) + if ((where & ~0x3) == ((PCI_EXP_CAP + PCI_EXP_RTCAP) & ~0x03)) *val &= ~(PCI_EXP_RTCAP_CRSVIS << 16); return PCIBIOS_SUCCESSFUL; }
The condition that was used to detect the PCI_EXP_RTCAP flag access is wrong, as pointed out by gcc-8: drivers/pci/host/pcie-iproc.c: In function 'iproc_pcie_config_read': drivers/pci/host/pcie-iproc.c:531:22: error: bitwise comparison always evaluates to false [-Werror=tautological-compare] if ((where & ~0x3) == PCI_EXP_CAP + PCI_EXP_RTCAP) This adds the same bit mask to the other end as well, so the condition is evaluated correctly for any access. Fixes: ac8d3e852f75 ("PCI: iproc: Work around Stingray CRS defects") Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- drivers/pci/host/pcie-iproc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)