[PATCH v2 3/3] PCI: j721e: Add warnings on num-lanes misconfiguration
From: Matt Ranostay <hidden>
Date: 2022-09-26 17:57:16
Also in:
linux-pci
Subsystem:
pci driver for cadence pcie ip, pci driver for ti dra7xx/j721e, pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Vignesh Raghavendra, Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Linus Torvalds
Added dev_warn messages to alert of devicetree misconfigurations for incorrect num-lanes setting, or the lack of one being defined. Cc: Kishon Vijay Abraham I <redacted> Signed-off-by: Matt Ranostay <redacted> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> --- drivers/pci/controller/cadence/pci-j721e.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index 0a537f2d5078..ee0ab04ca66e 100644
--- a/drivers/pci/controller/cadence/pci-j721e.c
+++ b/drivers/pci/controller/cadence/pci-j721e.c@@ -441,8 +441,17 @@ static int j721e_pcie_probe(struct platform_device *pdev) pcie->user_cfg_base = base; ret = of_property_read_u32(node, "num-lanes", &num_lanes); - if (ret || num_lanes > data->max_lanes) + if (ret) { + dev_warn(dev, "no num-lanes defined, defaulting to 1\n"); num_lanes = 1; + } + + if (num_lanes > data->max_lanes) { + dev_warn(dev, "defined num-lanes %d is greater than the " + "allowed maximum of %d, defaulting to 1\n", + num_lanes, data->max_lanes); + num_lanes = 1; + } pcie->num_lanes = num_lanes; if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)))
--
2.38.0.rc0.52.gdda7228a83
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