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Date: Sat, 25 Feb 2023 04:22:19 -0500 From: fk1xdcio@...k.com To: Heiner Kallweit <hkallweit1@...il.com> Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: Re: 4-port ASMedia/RealTek RTL8125 2.5Gbps NIC freezes whole system On 2023-02-25 03:04, Heiner Kallweit wrote: > On 25.02.2023 00:52, fk1xdcio@...k.com wrote: >> On 2023-02-24 15:21, Heiner Kallweit wrote: >>> On 24.02.2023 15:37, fk1xdcio@...k.com wrote: >>>> I'm having problems getting this 4-port 2.5Gbps NIC to be stable. I >>>> have tried on multiple different physical systems both with Xeon >>>> server and i7 workstation chipsets and it behaves the same way on >>>> everything. Testing with latest Arch Linux and kernels 6.1, 6.2, and >>>> 5.15. I'm using the kernel default r8169 driver. >> ... >>>> "SSU-TECH" (generic/counterfeit?) 4-port 2.5Gbps PCIe x4 card >>>> ASMedia ASM1812 PCIe switch (driver: pcieport) >>>> RTL8125BG x4 (driver: r8169) >> ... >>> The network driver shouldn't be able to freeze the system. You can >>> test whether vendor driver r8125 makes a difference. >>> This should provide us with an idea whether the root cause is at a >>> lower level. ... >> I don't know what "cmd = 0xff" is referring to. Is this a command >> directly to the Ethernet chipset? > > cmd is a chipset register and value 0xff indicates that it's not > accessible. > To me it looks like the issue is somewhere on PCIe level. I think you're right. I'm putting my efforts in to debugging the PCIe port and I'll take this to linux-pci. Thanks again
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