On Tue, May 31, 2016 at 10:25:52PM +0100, Chris Wilson wrote: > Since the introduction of (struct_mutex) lockless GEM bo freeing, there > are a pair of driver vfuncs for freeing the GEM bo, of which the driver > may choose to only implement driver->gem_object_free_unlocked (and so > avoid taking the struct_mutex along the free path). However, the CMA GEM > helpers were still calling driver->gem_free_object directly, now NULL, > and promptly dying on the fancy new lockless drivers. Oops. > > Robert Foss bisected this to b82caafcf2303 (drm/vc4: Use lockless gem BO > free callback) on his vc4 device, but that just serves as an enabler for > 9f0ba539d13ae (drm/gem: support BO freeing without dev->struct_mutex). > > Reported-by: Robert Foss <robert.foss@xxxxxxxxxxxxx> > Fixes: 9f0ba539d13ae (drm/gem: support BO freeing without dev->struct_mutex) > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Robert Foss <robert.foss@xxxxxxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx> > Cc: Eric Anholt <eric@xxxxxxxxxx> > Cc: Alex Deucher <alexdeucher@xxxxxxxxx> > Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx The original offending commit is only in 4.7, so no need for cc: stable. It won't hurt either though. Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx> > --- > drivers/gpu/drm/drm_fb_cma_helper.c | 2 +- > drivers/gpu/drm/drm_gem_cma_helper.c | 12 +++--------- > 2 files changed, 4 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c > index 172cafe11c71..5075fae3c4e2 100644 > --- a/drivers/gpu/drm/drm_fb_cma_helper.c > +++ b/drivers/gpu/drm/drm_fb_cma_helper.c > @@ -445,7 +445,7 @@ err_cma_destroy: > err_fb_info_destroy: > drm_fb_helper_release_fbi(helper); > err_gem_free_object: > - dev->driver->gem_free_object(&obj->base); > + drm_gem_object_unreference_unlocked(&obj->base); > return ret; > } > EXPORT_SYMBOL(drm_fbdev_cma_create_with_funcs); > diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c > index e1ab008b3f08..1d6c335584ec 100644 > --- a/drivers/gpu/drm/drm_gem_cma_helper.c > +++ b/drivers/gpu/drm/drm_gem_cma_helper.c > @@ -121,7 +121,7 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm, > return cma_obj; > > error: > - drm->driver->gem_free_object(&cma_obj->base); > + drm_gem_object_unreference_unlocked(&cma_obj->base); > return ERR_PTR(ret); > } > EXPORT_SYMBOL_GPL(drm_gem_cma_create); > @@ -162,18 +162,12 @@ drm_gem_cma_create_with_handle(struct drm_file *file_priv, > * and handle has the id what user can see. > */ > ret = drm_gem_handle_create(file_priv, gem_obj, handle); > - if (ret) > - goto err_handle_create; > - > /* drop reference from allocate - handle holds it now. */ > drm_gem_object_unreference_unlocked(gem_obj); > + if (ret) > + return ERR_PTR(ret); > > return cma_obj; > - > -err_handle_create: > - drm->driver->gem_free_object(gem_obj); > - > - return ERR_PTR(ret); > } > > /** > -- > 2.8.1 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
