Ubuntu mainline kernel v5.6 not supported by bcmwl-kernel-source

[Klaus Bielke]

I am using Ubuntu 18.04 with kernel 4.15.0-91-generic and packet bcmwl-kernel-source version 6.30.223.271+bdcom-0ubuntu5~18.04.1 from bionic-updates. Wifi BCM43228 802.11a/b/g/n [14e4:4359] is fine working.

But working stops after installing ubuntu mainline kernel v5.6 (image, modules, headers-all, headers-amd64). While installing kernel there were error messages regarding dkms and no dkms-modul was built.

bcmwl-kernel-source should support kernel v5.6

[Robert Ross (piexil)]

Having this same issue with building a custom ubuntu iso and pulling in kernel package 5.6-oem.
Seems package broadcom-sta-dkms has support for 5.6 so I'm going to give that a try.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ammar Faizi (ammarfaizi2)]

Having the same issue in 5.9.0-050900rc6-generic.

Error when installing the kernel:
Building module:
cleaning build area...
make -j4 KERNELRELEASE=5.9.0-050900rc6-generic -C /lib/modules/5.9.0-050900rc6-generic/build M=/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build......(bad exit status: 2)
ERROR (dkms apport): kernel package linux-headers-5.9.0-050900rc6-generic is not supported
Error! Bad return status for module build on kernel: 5.9.0-050900rc6-generic (x86_64)
Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information.
   ...done.

The log /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log:
DKMS make.log for bcmwl-6.30.223.271+bdcom for kernel 5.9.0-050900rc6-generic (x86_64)
Jum 25 Sep 2020 04:56:26 WIB
make: Entering directory '/usr/src/linux-headers-5.9.0-050900rc6-generic'
CFG80211 API is prefered for this kernel version
Using CFG80211 API
  AR /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/built-in.a
  CC [M] /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.o
  CC [M] /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.o
  CC [M] /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_iw.o
  CC [M] /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_cfg80211_hybrid.o
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.c: In function ‘osl_reg_map’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.c:949:10: error: implicit declaration of function ‘ioremap_nocache’; did you mean ‘ioremap_cache’? [-Werror=implicit-function-declaration]
  949 | return (ioremap_nocache((unsigned long)pa, (unsigned long)size));
      | ^~~~~~~~~~~~~~~
      | ioremap_cache
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.c:949:10: warning: returning ‘int’ from a function with return type ‘void *’ makes pointer from integer without a cast [-Wint-conversion]
  949 | return (ioremap_nocache((unsigned long)pa, (unsigned long)size));
      | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c: In function ‘wl_attach’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:593:20: error: implicit declaration of function ‘ioremap_nocache’; did you mean ‘ioremap_cache’? [-Werror=implicit-function-declaration]
  593 | if ((wl->regsva = ioremap_nocache(dev->base_addr, PCI_BAR0_WINSZ)) == NULL) {
      | ^~~~~~~~~~~~~~~
      | ioremap_cache
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:593:18: warning: assignment to ‘void *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
  593 | if ((wl->regsva = ioremap_nocache(dev->base_addr, PCI_BAR0_WINSZ)) == NULL) {
      | ^
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c: In function ‘wl_pci_probe’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:780:2: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
  780 | if ((val & 0x0000ff00) != 0)
      | ^~
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:782:3: note: .....