From c622032ebc538cb3869c312ae3ad235a99da84b6 Mon Sep 17 00:00:00 2001 From: Ley Foon Tan Date: Tue, 21 Jun 2016 16:53:12 +0800 Subject: [PATCH] PCI: altera: Check link status before retrain link 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 Signed-off-by: Bjorn Helgaas --- drivers/pci/host/pcie-altera.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c index a1e782263dec..b61025ee07de 100644 --- 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(struct altera_pcie *pcie) 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 -- 2.39.2