unload_mod.sh unloads the selected linux kernel module and all the other modules that depends on it.

unload_mod.sh

#!/bin/bash
###############################################################################
#
# Copyright 2013 Fernando E. M. López
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
###############################################################################

# If you are using experimental, propietary drivers, or propietary firmwares
# you may want to unload some modules when the driver fails, but sometimes
# there are lots of modules related to a device's driver, to unload all find
# the most general of the modules (the one the others rely on to work) and
# pass it as argument to this script.
#
# For example in order to unload the drivers of a usb device you may want
# to run:
#     ./unload_mod.sh usbcore
#
# If you want to reload some of the modules you can modify this script to
# invoke the funcion reload_modules at the end.



if [ $# -ne 1 ]; then
	echo "Uso: $0 [ modulo | --dvb ]"
	exit 1
fi

WRITE=$(mktemp)
chmod +x "$WRITE"
cat > "$WRITE" <<EOC
#!/bin/sh
FILE=\$1
shift
echo "\$*" > \$FILE
EOC

reload_modules(){
	# This function tries to make udev to reload some of the modules
	find /sys/devices/ -name uevent -exec "$WRITE" {} change \;
}

# Add your own options below:
case "$1" in
--dvb)
	$0 usbcore
	$0 usb_common
	$0 dvb_core
	$0 ir_core
	$0 i2c_core
	read -p "¡Listo! [Enter] para recargar los módulos, Ctrl-C para terminar"
	reload_modules
	exit 0
	;;
esac


dependencies(){
	# FIXME DEAD CODE
	lsmod | grep -E '(,| )'"$1"'(,|$)' | tr -s ' ' | cut -d ' ' -f1
}

dependents(){
	# Dependents of the $1 module
	lsmod | grep -E "^$1 " | tr -s ' ' | cut -d' ' -f4 | tr ',' ' '
}

rrdeps(){
	# Reverse recursive dependencies
	# loads the dependency tree in $DEPENDENCIES
	local module="$1"
	for dep in $(dependents "$module"); do
		rrdeps "$dep"
	done
	DEPENDENCIES="$DEPENDENCIES $module"
}


MODULE=$1

rrdeps "$MODULE"

echo "### Descargando: $DEPENDENCIES ###"

for dep in $DEPENDENCIES; do
	rmmod $dep
done