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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org On 26/08/2025 11:26, Manivannan Sadhasivam wrote: > On Tue, Aug 26, 2025 at 10:28:51AM GMT, Krzysztof Kozlowski wrote: >> On 26/08/2025 08:17, Manivannan Sadhasivam wrote: >>> On Tue, Aug 26, 2025 at 10:48:19AM GMT, Krishna Chaitanya Chundru wrote: >>>> The qcom_pcie_parse_ports() function currently iterates over all available >>>> child nodes of the PCIe controller's device tree node. This can lead to >>>> attempts to parse unrelated nodes like OPP nodes, resulting in unnecessary >>>> errors or misconfiguration. >>>> >>> >>> What errors? Errors you are seeing on your setup or you envision? >>> >>>> Restrict the parsing logic to only consider child nodes named "pcie" or >>>> "pci", which are the expected node names for PCIe ports. >>>> >>>> Signed-off-by: Krishna Chaitanya Chundru >>> >>> Since this is a fix, 'Fixes' tag is needed. >>> >>>> --- >>>> drivers/pci/controller/dwc/pcie-qcom.c | 2 ++ >>>> 1 file changed, 2 insertions(+) >>>> >>>> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c >>>> index 294babe1816e4d0c2b2343fe22d89af72afcd6cd..5dbdb69fbdd1b9b78a3ebba3cd50d78168f2d595 100644 >>>> --- a/drivers/pci/controller/dwc/pcie-qcom.c >>>> +++ b/drivers/pci/controller/dwc/pcie-qcom.c >>>> @@ -1740,6 +1740,8 @@ static int qcom_pcie_parse_ports(struct qcom_pcie *pcie) >>>> int ret = -ENOENT; >>>> >>>> for_each_available_child_of_node_scoped(dev->of_node, of_port) { >>>> + if (!(of_node_name_eq(of_port, "pcie") || of_node_name_eq(of_port, "pci"))) >>> >>> May I know which platform has 'pci' as the node name for the bridge node? AFAIK, >>> all platforms defining bridge nodes have 'pcie' as the node name. >> >> It does not matter. If I name my node name as "pc" it stops working? >> >> No, Qualcomm cannot introduce such hidden ABI. > > There is no hidden ABI that Qcom is introducing. We are just trying to reuse the > standard node names documented in the devicetree spec. So you are saying that > we should not rely on it even though it is documented? Maybe because, the dt > tooling is not yet screaming if people put non-standard names in DT? > If it is documented, you can use it, but I doubted first the author even checked that. Otherwise commit message would say that. As I mentioned in other response, I still find it discouraged pattern if you have (and you do have!) compatibles. Best regards, Krzysztof -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy