On Thu, Nov 12, 2015 at 05:38:48PM +0000, Emil Velikov wrote:
> Hi Ville,
>
> On 12 November 2015 at 16:52, <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
> > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> >
> > Let's name our planes in a way that makes sense wrt. the spec:
> > - skl+ -> "plane 1A", "plane 2A", "plane 1C", "cursor A" etc.
> > - g4x+ -> "primary A", "primary B", "sprite A", "cursor C" etc.
> > - pre-g4x -> "plane A", "cursor B" etc.
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/intel_display.c | 35 +++++++++++++++++++++++++++++++++--
> > drivers/gpu/drm/i915/intel_sprite.c | 14 ++++++++++++++
> > 2 files changed, 47 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > index 2b5e81a..82b2f58 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -13788,7 +13788,15 @@ static void intel_finish_crtc_commit(struct drm_crtc *crtc,
> > void intel_plane_destroy(struct drm_plane *plane)
> > {
> > struct intel_plane *intel_plane = to_intel_plane(plane);
> > + char *name;
> > +
> > + /*
> > + * drm_plane_cleanup() zeroes the structure, so
> > + * need an extra dance to avoid leaking the name.
> > + */
> > + name = plane->name;
> > drm_plane_cleanup(plane);
> > + kfree(name);
> > kfree(intel_plane);
> > }
> >
> > @@ -13838,6 +13846,21 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
> > if (HAS_FBC(dev) && INTEL_INFO(dev)->gen < 4)
> > primary->plane = !pipe;
> >
> > + if (INTEL_INFO(dev)->gen >= 9)
> > + primary->base.name = kasprintf(GFP_KERNEL, "plane 1%c",
> > + pipe_name(pipe));
> > + else if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
> > + primary->base.name = kasprintf(GFP_KERNEL, "primary %c",
> > + pipe_name(pipe));
> > + else
> > + primary->base.name = kasprintf(GFP_KERNEL, "plane %c",
> > + plane_name(primary->plane));
> > + if (!primary->base.name) {
> > + kfree(state);
> > + kfree(primary);
> > + return NULL;
> Worth adding a label and doing all the teardown there ? (same goes for
> the rest of the patch)
Dunno. Was feeling lazy, and so didn't go the extra mile.
>
> > + }
> > +
> > if (INTEL_INFO(dev)->gen >= 9) {
> > intel_primary_formats = skl_primary_formats;
> > num_formats = ARRAY_SIZE(skl_primary_formats);
> > @@ -13987,6 +14010,14 @@ static struct drm_plane *intel_cursor_plane_create(struct drm_device *dev,
> > cursor->commit_plane = intel_commit_cursor_plane;
> > cursor->disable_plane = intel_disable_cursor_plane;
> >
> > + cursor->base.name = kasprintf(GFP_KERNEL, "cursor %c",
> > + pipe_name(pipe));
> > + if (!cursor->base.name) {
> > + kfree(state);
> > + kfree(cursor);
> > + return NULL;
> > + }
> > +
> > drm_universal_plane_init(dev, &cursor->base, 0,
> > &intel_plane_funcs,
> > intel_cursor_formats,
> > @@ -14113,9 +14144,9 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
> >
> > fail:
> > if (primary)
> > - drm_plane_cleanup(primary);
> > + intel_plane_destroy(primary);
> > if (cursor)
> > - drm_plane_cleanup(cursor);
> > + intel_plane_destroy(cursor);
> Something feels strange here. We are either leaking memory before or
> we'll end up with double free after your patch. Worth
> checking/mentioning in the commit message ?
Yeah, I think we were leaking here. Forgot to add a note.
--
Ville Syrjälä
Intel OTC
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