[Bug 1910555] Re: Driver build error on kernel 5.8, but works on 5.4

[Jarle Land]

*** This bug is a duplicate of bug 1872908 ***
    https://bugs.launchpad.net/bugs/1872908

Same problem with BCM43227

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Title:
  Driver build error on kernel 5.8, but works on 5.4

Status in bcmwl package in Ubuntu:
  Confirmed

Bug description:
  Recently kernel was updated on Focal from 5.4 to 5.8. From that moment on WiFi doesn't work anymore. After a try rebuild (reconfigure) the result is:
  ---------------------------------------------------
  # dpkg-reconfigure bcmwl-kernel-source
  Removing all DKMS Modules
  Done.
  Loading new bcmwl-6.30.223.271+bdcom DKMS files...
  Building for 5.4.0-59-generic 5.8.0-34-generic
  Building for architecture x86_64
  Building initial module for 5.4.0-59-generic
  Done.

  wl.ko:
  Running module version sanity check.
   - Original module
     - No original module exists within this kernel
   - Installation
     - Installing to /lib/modules/5.4.0-59-generic/updates/dkms/

  depmod................

  DKMS: install completed.
  Building initial module for 5.8.0-34-generic
  ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/bcmwl-kernel-source.0.crash'
  Error! Bad return status for module build on kernel: 5.8.0-34-generic (x86_64)
  Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information.
  ---------------------------------------------------
  As could be seen, the build for 5.4 completes successfully (and works on same kernel), but for 5.8 fails. Seems something is going wrong with missing function declaration - function "ioremap_nocache", as could be seen in attached make.log.
  I'm guessing, driver code may need be updated according to the new kernel headers.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: bcmwl-kernel-source 6.30.223.271+bdcom-0ubuntu5
  ProcVersionSignature: Ubuntu 5.4.0-59.65-generic 5.4.78
  Uname: Linux 5.4.0-59-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.11-0ubuntu27.14
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: KDE
  Date: Thu Jan  7 17:13:05 2021
  InstallationDate: Installed on 2020-06-22 (198 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  SourcePackage: bcmwl
  UpgradeStatus: No upgrade log present (probably fresh install)

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