Error while running nbftconfig on RHEL 6.X and later ,Cannot continue since qla2xxx is in use and cannot be removed

Problem

If there are issues with a FT (fibre transport) media server such that it is not functioning correctly, it may be required to delete and then rerun the FT media server configuration using the command nbftconfig.

However, executing the nbftconfig command may display the error message   Cannot continue since qla2xxx is in use and cannot be removed, Please release references to qla2xxx before trying the install again
 

Error Message

When trying to run the FT media server configuration command nbftconfig on RHEL 6.X and later ,error message  Cannot continue since qla2xxx is in use and cannot be removed
Please release references to qla2xxx before trying the install again  is displayed and the configuration of the FT media server cannot continue.

Cause

qla2xxx and its dependent devices/modules are in use

Solution

For RHEL version prior to 6.x

This issue can be resolved by following steps in article
The Related Article contains a resolution for this issue; however, RHEL 6.x doesnt have /etc/modprobe.conf.

Steps to resolve this issue :

Remove current module/driver:  It is necessary to remove all dependent devices/modules first.  When checked with the command:
# modprobe -r qla2xxx
FATAL: Module qla2xxx is in use.

Show dependent devices/modules:
# modprobe --show-depends qla2xxx

Example output:
insmod /lib/modules/2.6.32-358.14.1.el6.x86_64/kernel/drivers/scsi/scsi_tgt.ko
insmod

/lib/modules/2.6.32-358.14.1.el6.x86_64/kernel/drivers/scsi/scsi_transport_fc.koinsmod
/lib/modules/2.6.32-358.14.1.el6.x86_64/kernel/drivers/scsi/qla2xxx/qla2xxx.ko

Then, try to remove scsi_tgt:
# modprobe -r scsi_tgt
FATAL: Module scsi_tgt is in use

The error above shows that the device is being used, which means probably there are some devices are connected via Fibre.  Disconnect the fibre cable from the FT media server target port.

Once this is done, remove scsi_tgt, then scsi_transpot_fc, followed by qla2xxx, using modprobe –r.

Now, the nbftconfig command should work and the FT media server can be reconfigured.