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Date: Fri, 19 Dec 2014 11:15:44 +0100 From: Thierry Reding <treding@...dia.com> To: Fengguang Wu <fengguang.wu@...el.com> CC: Daniel Vetter <daniel.vetter@...ll.ch>, LKP <lkp@...org>, <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org> Subject: Re: [drm/fb-helper] BUG: unable to handle kernel paging request at 95d24c70 On Thu, Dec 18, 2014 at 06:04:45PM -0800, Fengguang Wu wrote: > > Hi Thierry, > > FYI, here is another bisect result. Thanks. Looking at the cirrus driver more closely it already employs the big hammer upon failure and ends up calling drm_fb_helper_fini() via the cirrus_driver_unload() call in cirrus_driver_load()'s cleanup path. > commit 7bf2844ed14de049a4ccec26eb3d8b4c3d5c1971 > Author: Thierry Reding <treding@...dia.com> > AuthorDate: Wed Dec 17 16:39:59 2014 +0100 > Commit: Daniel Vetter <daniel.vetter@...ll.ch> > CommitDate: Wed Dec 17 22:05:08 2014 +0100 > > drm/fb-helper: Propagate errors from initial config failure > > Make drm_fb_helper_initial_config() return an int rather than a bool so > that the error can be properly propagated. While at it, update drivers > to propagate errors further rather than just ignore them. > > Cc: David Airlie <airlied@...ux.ie> > Cc: Daniel Vetter <daniel.vetter@...ll.ch> > Cc: Patrik Jakobsson <patrik.r.jakobsson@...il.com> > Cc: Rob Clark <robdclark@...il.com> > Cc: Tomi Valkeinen <tomi.valkeinen@...com> > Cc: Alex Deucher <alexander.deucher@....com> > Cc: Christian König <christian.koenig@....com> > Cc: Ben Skeggs <bskeggs@...hat.com> > Signed-off-by: Thierry Reding <treding@...dia.com> > Reviewed-by: Alex Deucher <alexander.deucher@....com> > Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@...il.com> > Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch> Using the attached patch on top of this I can no longer reproduce either this or the earlier result. I'll send a revised patch with this squashed in. Thanks, Thierry View attachment "patch" of type "text/plain" (927 bytes) Content of type "application/pgp-signature" skipped
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