How to download missing the firmware files when running the update-initramfs command

firmware.sh

#!/bin/bash
# Usage: ./firmware.sh "W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_dmcub.bin for module amdgpu"
# or, save all firmware errors in a file:
# cat missing-firmware.txt | xargs -I % ./firmware.sh %
download() {
  firmware=$(echo $1 | awk '{ print $5}')
  module=$(echo $firmware | awk -F/ '{ print $4 }')
  bin=$(echo $firmware | awk -F/ '{ print $5 }')
  #https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/amdgpu/arcturus_asd.bin
  url=https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/$module/$bin
  sudo mkdir -p /lib/firmware/$module
  name=$(echo $1 | awk '{ print $(NF) }')
  echo "Downloading missing firmware $bin for module $name"
  sudo curl -sL --output /lib/firmware/$module/$bin $url
}

if [[ -n $1 ]]
then
  download $1
fi

$ cat missing-firmware.txt | xargs -I % ./firmware.sh %
Downloading missing firmware rtl8125b-2.fw for module r8169
Downloading missing firmware vangogh_gpu_info.bin for module amdgpu
Downloading missing firmware navi12_gpu_info.bin for module amdgpu
Downloading missing firmware arcturus_gpu_info.bin for module amdgpu
Downloading missing firmware polaris12_32_mc.bin for module amdgpu