PREUN

/bin/sh

dkms remove  -m ipw3945 -v 1.2.0-1mdv2007.1 --all --rpm_safe_upgrade

POSTIN

/bin/sh

dkms add     -m ipw3945 -v 1.2.0-1mdv2007.1 --rpm_safe_upgrade
dkms build   -m ipw3945 -v 1.2.0-1mdv2007.1 --rpm_safe_upgrade
dkms install -m ipw3945 -v 1.2.0-1mdv2007.1 --rpm_safe_upgrade
# rmmod any old driver if present and not in use
rmmod ipw3945 > /dev/null 2>&1 || true