grep in `lspci -v`

pcigrep.sh

#!/bin/bash
ROPT=
while [ -n "$1" ]; do
        case "$1" in
        -i)
                ROPT=I
                shift
                ;;
        --)
                shift
                break
                ;;
        -*)
                >&2 echo "Usage: $0 [-i] [--] [regex]"
                exit 1
                ;;
        *)
                break
                ;;
        esac
done
lspci -v |sed -n '/^\S.*'"${1//\//\\\/}"'/'"$ROPT"',/^$/p'