The r8169 driver is not recognizing my CardBus ethernet card depending on the chipset it has. It seems to be related to the PCI bus recognizing the card. It works with some hardware and not with others on the same kernel. This is with both the 5.1.0-rc2 and 5.0.4 kernels, so I am up to date with patches. I have been able to debug it down to mdiobus_scan() returning returned -EIO, but that failure probably should not happen. Below is the relevant PCI information: Failing systems: - The same 81801 bridge chip, different CardBus chips 00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 81) 02:00.0 CardBus bridge [0607]: Texas Instruments PCI4520 PC card Cardbus Controller [104c:ac46] (rev 01) 02:00.1 CardBus bridge [0607]: Texas Instruments PCI4520 PC card Cardbus Controller [104c:ac46] (rev 01) 07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller [10ec:8169] (rev 10) 00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 81) 02:01.0 CardBus bridge [0607]: Texas Instruments PCI1520 PC card Cardbus Controller [104c:ac55] (rev 01) 02:01.1 CardBus bridge [0607]: Texas Instruments PCI1520 PC card Cardbus Controller [104c:ac55] (rev 01) 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller [10ec:8169] (rev 10) Working systems: 00:01.0 PCI bridge [0604]: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge [8086:7191] (rev 02) 00:04.0 CardBus bridge [0607]: Texas Instruments PCI1220 [104c:ac17] (rev 02) 00:04.1 CardBus bridge [0607]: Texas Instruments PCI1220 [104c:ac17] (rev 02) 06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller [10ec:8169] (rev 10) 00:00.0 Host bridge [0600]: Cyrix Corporation PCI Master [1078:0001] 00:11.0 CardBus bridge [0607]: Texas Instruments PCI1221 [104c:ac19] 00:11.1 CardBus bridge [0607]: Texas Instruments PCI1221 [104c:ac19] 01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller [10ec:8169] (rev 10) - Matthew Whitehead
