On Mon, Aug 15, 2016 at 04:36:19PM +0800, Ley Foon Tan wrote: > Altera PCIe IP can be configured as rootport or device and they might have > same vendor ID. It will cause the system hang issue if Altera PCIe is in > endpoint mode and work with other PCIe rootport that from other vendors. > So, add the rootport mode checking in link retrain fixup function. > > Signed-off-by: Ley Foon Tan <[email protected]> > --- > drivers/pci/host/pcie-altera.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c > index 58eef99..6477738 100644 > --- a/drivers/pci/host/pcie-altera.c > +++ b/drivers/pci/host/pcie-altera.c > @@ -139,6 +139,9 @@ static void altera_pcie_retrain(struct pci_dev *dev) > u16 linkcap, linkstat; > struct altera_pcie *pcie = dev->bus->sysdata; > > + if (!pci_is_root_bus(dev->bus)) > + return;
It seems like it would be more direct to check for "pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT"? > if (!altera_pcie_link_is_up(pcie)) > return; > > -- > 1.8.2.1 >
