setup ethernet i225-it driver error on CentOS 8, With kernel Ver 4.18.0-348

[yang_cheng_yu]

Hi:

I  have a  computer with  3  intel ethernet interface  , The  model  is i225-it.   Linux version is         'CentOS 8   4.18.0.348.el8.x86_64

1 、I  have got  igc driver files  from  https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/5.8.7

2、  i  compile  the driver under  dir  inux-5.8.7/drivers/net/ethernet/intel/igc  successfully。

2、  type:  insmod  igc.ko

3、 check status:   dmesg | grep igc  ,  shows  bellow error message:

      igc:probe of 0000:02:00.0 failed with error -2

       igc:probe of 0000:03:00.0 failed with error -2

       igc:probe of 0000:05:00.0 failed with error -2

4、 the makefile context bellow:

    -----------------------------------------------------------------------------------------------

obj-$(CONFIG_IGC) += igc.o

igc-objs := igc_main.o igc_mac.o igc_i225.o igc_base.o igc_nvm.o igc_phy.o \

igc_diag.o igc_ethtool.o igc_ptp.o igc_dump.o igc_tsn.o

KERNEL_SRC :=/lib/modules/$(shell uname -r)/build

all:

$(MAKE) -C $(KERNEL_SRC) M=$(PWD) modules

clean:

$(MAKE) -C $(KERNEL_SRC) M=$(PWD) clean

.PHONY: clean  all 

--------------------------------------------------------------------------------------

       Thanks!

[Diego_INTEL]

Hello @yang_cheng_yu,

Thank you for contacting Intel Embedded Community.

You may check the latest igc driver from this link:

https://github.com/torvalds/linux/tree/master/drivers/net/ethernet/intel/igc

CentOS is not under the supported OS for the i225/i226:

https://www.intel.com/content/www/us/en/support/articles/000055236/ethernet-products/gigabit-ethernet-controllers-up-to-2-5gbe.html

I looked internally and you can try to add the following patches:
https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git/commit/drivers/net/ethernet/intel/igc?h=dev-queue&id=7c496de538eebd8212dc2a3c9a468386b264d0d4 

https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git/commit/drivers/net/ethernet/intel/igc?h=dev-queue&id=47bca7de6a4fb8dcb564c7ca14d885c91ed19e03 

Best regards,

@Diego_INTEL