[PATCH v2 5/7] drm/panic: Convert to drm_fb_clip_offset()

[Geert Uytterhoeven]

On Sun, Jun 16, 2024 at 11:08 AM Geert Uytterhoeven
<geert at linux-m68k.org> wrote:
> On Sat, Jun 15, 2024 at 12:55 PM kernel test robot <lkp at intel.com> wrote:
> > kernel test robot noticed the following build errors:
> >
> > [auto build test ERROR on drm-misc/drm-misc-next]
> > [cannot apply to linus/master v6.10-rc3 next-20240613]
> > [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#_base_tree_information]
> >
> > url:    https://github.com/intel-lab-lkp/linux/commits/Geert-Uytterhoeven/drm-panic-Fix-uninitialized-drm_scanout_buffer-set_pixel-crash/20240614-032053
> > base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
> > patch link:    https://lore.kernel.org/r/3121082eb4beb461773ebb6f656ed9b4286967ee.1718305355.git.geert%2Brenesas%40glider.be
> > patch subject: [PATCH v2 5/7] drm/panic: Convert to drm_fb_clip_offset()
> > config: x86_64-randconfig-003-20240615 (https://download.01.org/0day-ci/archive/20240615/202406151811.yEIZ6203-lkp@intel.com/config)
> > compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240615/202406151811.yEIZ6203-lkp@intel.com/reproduce)
> >
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <lkp at intel.com>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202406151811.yEIZ6203-lkp@intel.com/
> >
> > All errors (new ones prefixed by >>):
> >
> > >> depmod: ERROR: Cycle detected: drm -> drm_kms_helper -> drm
> >    depmod: ERROR: Found 2 modules in dependency cycles!
>
> Oops, so DRM core cannot call any of the helpers, and DRM_PANIC
> selecting DRM_KMS_HELPER was wrong in the first place?

Q: So how does this work with DRM_PANIC calling
   drm_fb_helper_emergency_disable()?
A: drm_fb_helper_emergency_disable() is a dummy if
   !CONFIG_DRM_FBDEV_EMULATION, so I guess no one tried to build
   a failing randconfig with CONFIG_DRM_FBDEV_EMULATION=y yet.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds