Re: [PATCH v3] drivers: gpio: add virtio-gpio guest driver

[kernel test robot]

Hi "Enrico,

I love your patch! Yet something to improve:

[auto build test ERROR on gpio/for-next]
[also build test ERROR on linux/master linus/master v5.10-rc7 next-20201207]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Enrico-Weigelt-metux-IT-consult/drivers-gpio-add-virtio-gpio-guest-driver/20201208-045646
base:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git for-next
config: h8300-randconfig-r032-20201207 (attached as .config)
compiler: h8300-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/fff1ac3789d850604f11c95b185116bea68e26a9
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Enrico-Weigelt-metux-IT-consult/drivers-gpio-add-virtio-gpio-guest-driver/20201208-045646
        git checkout fff1ac3789d850604f11c95b185116bea68e26a9
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

>> drivers/i2c/Kconfig:8:error: recursive dependency detected!
   drivers/i2c/Kconfig:8: symbol I2C is selected by FB_DDC
   drivers/video/fbdev/Kconfig:63: symbol FB_DDC depends on FB
   drivers/video/fbdev/Kconfig:12: symbol FB is selected by DRM_KMS_FB_HELPER
   drivers/gpu/drm/Kconfig:80: symbol DRM_KMS_FB_HELPER depends on DRM_KMS_HELPER
   drivers/gpu/drm/Kconfig:74: symbol DRM_KMS_HELPER is selected by DRM_VIRTIO_GPU
   drivers/gpu/drm/virtio/Kconfig:2: symbol DRM_VIRTIO_GPU depends on VIRTIO
   drivers/virtio/Kconfig:2: symbol VIRTIO is selected by GPIO_VIRTIO
   drivers/gpio/Kconfig:1628: symbol GPIO_VIRTIO depends on GPIOLIB
   drivers/gpio/Kconfig:14: symbol GPIOLIB is selected by I2C_MUX_LTC4306
   drivers/i2c/muxes/Kconfig:47: symbol I2C_MUX_LTC4306 depends on I2C
   For a resolution refer to Documentation/kbuild/kconfig-language.rst
   subsection "Kconfig recursive dependency limitations"

vim +8 drivers/i2c/Kconfig

da3c6647ee0871 Lan Tianyu         2014-05-20   7  
da3c6647ee0871 Lan Tianyu         2014-05-20  @8  config I2C
^1da177e4c3f41 Linus Torvalds     2005-04-16   9  	tristate "I2C support"
194684e596af4b Mika Kuoppala      2009-12-06  10  	select RT_MUTEXES
4d5538f5882a6b Benjamin Tissoires 2016-10-13  11  	select IRQ_DOMAIN
a7f7f6248d9740 Masahiro Yamada    2020-06-14  12  	help
622e040d577dc8 Michael Witten     2011-07-08  13  	  I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
^1da177e4c3f41 Linus Torvalds     2005-04-16  14  	  many micro controller applications and developed by Philips.  SMBus,
^1da177e4c3f41 Linus Torvalds     2005-04-16  15  	  or System Management Bus is a subset of the I2C protocol.  More
^1da177e4c3f41 Linus Torvalds     2005-04-16  16  	  information is contained in the directory <file:Documentation/i2c/>,
^1da177e4c3f41 Linus Torvalds     2005-04-16  17  	  especially in the file called "summary" there.
^1da177e4c3f41 Linus Torvalds     2005-04-16  18  
^1da177e4c3f41 Linus Torvalds     2005-04-16  19  	  Both I2C and SMBus are supported here. You will need this for
^1da177e4c3f41 Linus Torvalds     2005-04-16  20  	  hardware sensors support, and also for Video For Linux support.
^1da177e4c3f41 Linus Torvalds     2005-04-16  21  
^1da177e4c3f41 Linus Torvalds     2005-04-16  22  	  If you want I2C support, you should say Y here and also to the
^1da177e4c3f41 Linus Torvalds     2005-04-16  23  	  specific driver for your bus adapter(s) below.
^1da177e4c3f41 Linus Torvalds     2005-04-16  24  
^1da177e4c3f41 Linus Torvalds     2005-04-16  25  	  This I2C support can also be built as a module.  If so, the module
^1da177e4c3f41 Linus Torvalds     2005-04-16  26  	  will be called i2c-core.
^1da177e4c3f41 Linus Torvalds     2005-04-16  27  

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