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[PATCHv2,2/4] PCI: dwc: Return directly when num-lanes is not found

Message ID 20190820073022.24217-3-Zhiqiang.Hou@nxp.com
State Accepted
Delegated to: Lorenzo Pieralisi
Headers show
Series Layerscape: Remove num-lanes property from PCIe nodes | expand

Commit Message

Z.Q. Hou Aug. 20, 2019, 7:28 a.m. UTC 
From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

The num-lanes is optional, so probably it isn't added
on some platforms. The subsequent programming is base
on the num-lanes, hence return when it is not found.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
---
V2:
 - No change.

 drivers/pci/controller/dwc/pcie-designware.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 7d25102c304c..0a89bfd1636e 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -423,8 +423,10 @@  void dw_pcie_setup(struct dw_pcie *pci)
 
 
 	ret = of_property_read_u32(np, "num-lanes", &lanes);
-	if (ret)
-		lanes = 0;
+	if (ret) {
+		dev_dbg(pci->dev, "property num-lanes isn't found\n");
+		return;
+	}
 
 	/* Set the number of lanes */
 	val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL);