Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	mrfioc2 error
From:	gjzhai--- via Tech-talk <tech-talk at aps.anl.gov>
To:	tech-talk at aps.anl.gov
Date:	Tue, 22 Feb 2022 16:40:07 +0800 (GMT+08:00)

Hello! I used to use mrf-linux-driver from MRF. To load mrfioc2 IOC, I should delete pci_mrfevg and pci_mrfevr.

[root@localhost mrmShared]# lsmod |grep mrf

mrf 18421 0

uio 19338 1 mrf

parport 46395 1 mrf

pci_mrfevg 53731 0

pci_mrfevr 53731 0

As above, I want to delete pci_mrfevg and pci_mrfevr. I execute the following command to delete "pci_mrfevr.ko".

[root@localhost]# cd /lib/modules/3.10.0-1160.42.2.el7.x86_64/extra/

[root@localhost]# rm pci_mrfevg.ko

[root@localhost]# rm pci_mrfevr.ko

After restarting, there are still pcievg and pcievr. Some of the information displayed by the dmesg command is as follows:

[ 1.343665] pci_mrfevr: loading out-of-tree module taints kernel.

[ 1.343997] pci_mrfevr: module verification failed: signature and/or required key missing - tainting kernel

[ 1.344404] Event Receiver PCI/PCIe driver init.

[ 1.344659] mrfevr:BAR0 start df200000 end df23ffff, mmap 03700000

[ 1.345275] mrfevr:BAR0 start df000000 end df03ffff, mmap 03780000

[ 1.345581] Event Generator PCI/PCIe driver init.

[ 1.346094] mrfevg:BAR0 start df100000 end df17ffff mmaped 03800000

I would like to ask how to delete "pci_mrfevr.ko" and load mrfioc2 IOC successfully?

Thank you for your time.I am looking forward to your reply.

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ANJ, 14 Sep 2022