[PATCH v3 12/16] PCI: dwc: sophgo: Use cached PCIe capability offset

[Hans Zhang]

dw_pcie_host_init() calls .init before caching, so we must call
dw_pcie_get_pcie_cap() inside .init. The hardware is already enabled by
the driver's own initialization before this point. The helper will cache
the offset and avoid redundant searches.

Signed-off-by: Hans Zhang <18255117159 at 163.com>
---
In pcie-sophgo, the call chain is:

  static const struct dw_pcie_host_ops sophgo_pcie_host_ops = {
    .init = sophgo_pcie_host_init,
  };
  sophgo_pcie_host_init()
    -> sophgo_pcie_disable_l0s_l1()
      -> dw_pcie_find_capability()
---
 drivers/pci/controller/dwc/pcie-sophgo.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-sophgo.c b/drivers/pci/controller/dwc/pcie-sophgo.c
index 044088898819..39703d2b7b5f 100644
--- a/drivers/pci/controller/dwc/pcie-sophgo.c
+++ b/drivers/pci/controller/dwc/pcie-sophgo.c
@@ -164,9 +164,10 @@ static void sophgo_pcie_msi_enable(struct dw_pcie_rp *pp)
 static void sophgo_pcie_disable_l0s_l1(struct dw_pcie_rp *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-	u32 offset, val;
+	u8 offset;
+	u32 val;
 
-	offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
+	offset = dw_pcie_get_pcie_cap(pci);
 
 	dw_pcie_dbi_ro_wr_en(pci);
 
-- 
2.34.1