linux-kernel - Re: [PATCH v2 3/7] PCI: sg2042: Add Sophgo SG2042 PCIe driver

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Message-ID:
 <MAUPR01MB1107222DD9BBA9349C3907E21FE08A@MAUPR01MB11072.INDPRD01.PROD.OUTLOOK.COM>
Date: Fri, 12 Sep 2025 08:52:30 +0800
From: Chen Wang <unicorn_wang@...look.com>
To: Mingcong Bai <jeffbai@...c.io>, Chen Wang <unicornxw@...il.com>,
 kwilczynski@...nel.org, u.kleine-koenig@...libre.com, aou@...s.berkeley.edu,
 alex@...ti.fr, arnd@...db.de, bwawrzyn@...co.com, bhelgaas@...gle.com,
 conor+dt@...nel.org, 18255117159@....com, inochiama@...il.com,
 kishon@...nel.org, krzk+dt@...nel.org, lpieralisi@...nel.org,
 mani@...nel.org, palmer@...belt.com, paul.walmsley@...ive.com,
 robh@...nel.org, s-vadapalli@...com, tglx@...utronix.de,
 thomas.richard@...tlin.com, sycamoremoon376@...il.com,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-pci@...r.kernel.org, linux-riscv@...ts.infradead.org,
 sophgo@...ts.linux.dev, rabenda.cn@...il.com, chao.wei@...hgo.com,
 xiaoguang.xing@...hgo.com, fengchun.li@...hgo.com
Subject: Re: [PATCH v2 3/7] PCI: sg2042: Add Sophgo SG2042 PCIe driver


On 9/12/2025 12:17 AM, Mingcong Bai wrote:
> Hi Chen,
>
> 在 2025/9/10 10:08, Chen Wang 写道:
>> +config PCIE_SG2042_HOST
>> +    tristate "Sophgo SG2042 PCIe controller (host mode)"
>> +    depends on OF && (ARCH_SOPHGO || COMPILE_TEST)
>> +    select PCIE_CADENCE_HOST
>> +    help
>> +      Say Y here if you want to support the Sophgo SG2042 PCIe platform
>> +      controller in host mode. Sophgo SG2042 PCIe controller uses 
>> Cadence
>> +      PCIe core.
>> +
>
> While build testing this patch against v6.16.6, PCIE_SG2042_HOST is 
> set to "M", the kernel would fail to build during MODPOST:
>
> ERROR: modpost: "cdns_pcie_pm_ops" 
> [drivers/pci/controller/cadence/pcie-sg2042.ko] undefined!
> make[2]: *** [scripts/Makefile.modpost:147: Module.symvers] Error 1
> make[1]: *** [[...]/linux-6.16.6/Makefile:1953: modpost] Error 2
> make: *** [Makefile:248: __sub-make] Error 2
>
My fault, seems there were some problems when I submitted the driver 
code. I will correct them immediately and submit a new version.

Thanks,

Chen


> Best Regards,
> Mingcong Bai