[PATCH v3 07/16] PCI: dwc: eswin: Use cached PCIe capability offset
From: Hans Zhang <18255117159@163.com>
Date: 2026-07-20 15:08:15
Also in:
imx, linux-amlogic, linux-arm-msm, linux-pci, linux-riscv, linux-rockchip, linux-tegra, lkml, spacemit
Subsystem:
pci native host bridge and endpoint drivers, pci subsystem, pcie driver for eswin, the rest · Maintainers:
Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Senchuan Zhang, Linus Torvalds
This function is called after dw_pcie_host_init() has already cached the
offset (dw_pcie_link_up() is called after .init and after caching).
Therefore, we can directly use pci->pcie_cap.
Signed-off-by: Hans Zhang <18255117159@163.com>
---
In pcie-eswin, the call chain is:
static const struct dw_pcie_ops dw_pcie_ops = {
.link_up = eswin_pcie_link_up,
};
eswin_pcie_link_up()
-> dw_pcie_find_capability()
---
drivers/pci/controller/dwc/pcie-eswin.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-eswin.c b/drivers/pci/controller/dwc/pcie-eswin.c
index ce8d64f8a395..6a37fd5a8384 100644
--- a/drivers/pci/controller/dwc/pcie-eswin.c
+++ b/drivers/pci/controller/dwc/pcie-eswin.c@@ -84,8 +84,7 @@ static int eswin_pcie_start_link(struct dw_pcie *pci) static bool eswin_pcie_link_up(struct dw_pcie *pci) { - u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); - u16 val = dw_pcie_readw_dbi(pci, offset + PCI_EXP_LNKSTA); + u16 val = dw_pcie_readw_dbi(pci, pci->pcie_cap + PCI_EXP_LNKSTA); return val & PCI_EXP_LNKSTA_DLLLA; }
--
2.34.1