PCI: tegra194: Fix link up retry sequence

[ Upstream commit e05fd6ae77c3e2cc0dba283005d24b6d56d2b1fa ]

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: 56e15a238d92 ("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 ba9f29d..bdd8476 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -978,7 +978,7 @@ retry_link:
                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_dw_host_init(pp);
                dw_pcie_setup_rc(pp);