4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Ley Foon Tan <[email protected]> commit c622032ebc538cb3869c312ae3ad235a99da84b6 upstream. Check the link status before retraining. If the link is not up, don't bother trying to retrain it. [bhelgaas: split code move to separate patch, changelog] Signed-off-by: Ley Foon Tan <[email protected]> Signed-off-by: Bjorn Helgaas <[email protected]> Cc: Claudius Heine <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/pci/host/pcie-altera.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/pci/host/pcie-altera.c +++ b/drivers/pci/host/pcie-altera.c @@ -100,6 +100,10 @@ static bool altera_pcie_link_is_up(struc static void altera_pcie_retrain(struct pci_dev *dev) { u16 linkcap, linkstat; + struct altera_pcie *pcie = dev->bus->sysdata; + + if (!altera_pcie_link_is_up(pcie)) + return; /* * Set the retrain bit if the PCIe rootport support > 2.5GB/s, but
