Comment 0 for bug 2012407

SRU justification:

[Impact]

This is encountered on linux kernel derivatives with fewer configuration options enabled.
First time saw on jammy:linux-kvm-1029.

During build, it fails with the following error:

...
SRU justification:

[Impact]

This is encountered on linux kernel derivatives with fewer configuration options enabled.
First time seen on jammy:linux-kvm-1029.

During build, it fails with the following error:
...
Building module:
cleaning build area...
make -j1 KERNELRELEASE=5.15.0-1030-kvm KERNELRELEASE=5.15.0-1030-kvm KERNEL_SRC=/lib/modules/5.15.0-1030-kvm/build...........(bad exit status: 2)
Error! Bad return status for module build on kernel: 5.15.0-1030-kvm (x86_64)
Consult /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/make.log for more information.
E: ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1 failed to build for 5.15.0-1030-kvm
========== /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/make.log ==========
DKMS make.log for ipu6-drivers-0~git202211220708.278b7e3d-0ubuntu0.22.04.1 for kernel 5.15.0-1030-kvm (x86_64)
Wed Mar 8 23:42:18 UTC 2023
make -C /lib/modules/5.15.0-1030-kvm/build M=/var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build modules
make[1]: Entering directory '/usr/src/linux-headers-5.15.0-1030-kvm'
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-bus.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-dma.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-mmu.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-buttress.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-trace.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-cpd.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/ipu6.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-fw-com.o
  CC [M] /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-isys-bridge.o
/var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-isys-bridge.c: In function ‘ipu_isys_bridge_unregister_sensors’:
/var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-isys-bridge.c:283:17: error: implicit declaration of function ‘i2c_unregister_device’; did you mean ‘pci_unregister_driver’? [-Werror=implicit-function-declaration]
  283 | i2c_unregister_device(sensor->vcm_i2c_client);
      | ^~~~~~~~~~~~~~~~~~~~~
      | pci_unregister_driver
cc1: some warnings being treated as errors
make[4]: *** [scripts/Makefile.build:297: /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6/../ipu-isys-bridge.o] Error 1
make[3]: *** [scripts/Makefile.build:560: /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel/ipu6] Error 2
make[2]: *** [scripts/Makefile.build:560: /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/pci/intel] Error 2
make[1]: *** [Makefile:1906: /var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.15.0-1030-kvm'
make: *** [Makefile:37: all] Error 2
====================
./ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/make.log
autopkgtest [23:42:45]: test dkms-autopkgtest: -----------------------]
autopkgtest [23:42:46]: test dkms-autopkgtest: - - - - - - - - - - results - - - - - - - - - -
dkms-autopkgtest FAIL non-zero exit status 1
autopkgtest [23:42:46]: @@@@@@@@@@@@@@@@@@@@ summary

because CONFIG_I2C=n

[Fix]
Add a rule to avoid building ipu6-drivers when CONFIG_I2C=n

[Test Plan]
Install a new version of jammy:linux-kvm (1029 for example).
apt install ipu6-drivers will fail as described above.
After the fix, it will not built at all.

Once the package is in proposed, a new adt is triggered against proposed for jammy:linux-kvm.

[Where problems could occur]
Low possibility of new issues.

[Note]
This fix is not scalable in the sense that if configuration name changes, the module has to be changed as well.