From: Ley Foon Tan Date: Tue, 21 Jun 2016 08:53:12 +0000 (+0800) Subject: PCI: altera: Check link status before retrain link X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c622032ebc538cb3869c312ae3ad235a99da84b6;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 --- 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