PCI: tegra194: Fix link up retry sequence

[ Upstream commit 441020f4c73057b94bcc31b61d77fc7576a78f9c ]

Add the missing DLF capability offset while clearing DL_FEATURE_EXCHANGE_EN
bit during link up retry.

Link: https://lore.kernel.org/r/20220721142052.25971-15-vidyas@nvidia.com
Fixes: 5e6510231597 ("PCI: tegra: Add Tegra194 PCIe support")
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index c7ac61a6080bca80258234ad860e90e211ab54d7..120d64c1a27fd97edd638495981cb342d99398f9 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -854,7 +854,7 @@ static int tegra_pcie_dw_host_init(struct pcie_port *pp)
                offset = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_DLF);
                val = dw_pcie_readl_dbi(pci, offset + PCI_DLF_CAP);
                val &= ~PCI_DLF_EXCHANGE_ENABLE;
-               dw_pcie_writel_dbi(pci, offset, val);
+               dw_pcie_writel_dbi(pci, offset + PCI_DLF_CAP, val);
 
                tegra_pcie_prepare_host(pp);