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| author |   Hou Zhiqiang <Zhiqiang.Hou@nxp.com> | 2019-08-20 07:28:49 +0000 |
|---|---|---|
| committer |   Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2019-08-22 18:16:24 +0100 |
| commit | 66de33f09fd97201847de7e1e2ec8a117242e1d6 (patch) | |
| tree | 98b3ede054ba793b5e3f5f16b6d2363cebd6e1ef /drivers/pci/controller/dwc/pcie-designware.c | |
| parent | dt-bindings: PCI: designware: Remove the num-lanes from Required properties (diff) | |
| download | linux-dev-66de33f09fd97201847de7e1e2ec8a117242e1d6.tar.xz linux-dev-66de33f09fd97201847de7e1e2ec8a117242e1d6.zip | |
PCI: dwc: Return directly when num-lanes is not found
The num-lanes is optional since it is not needed on some platforms
that bring up the link in firmware.
The link programming is based on the num-lanes properties (which is
optional); if it is not present code must return instead of fiddling
with the lanes value to print an error message.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware.c | 6 |
1 files changed, 4 insertions, 2 deletions
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); |