diff options
author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-12-07 20:56:47 +0300 |
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committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-12-22 22:26:33 +0300 |
commit | ecd9caa0522db5a6b03ac8858c42067ef9d8323b (patch) | |
tree | 026c26d2b14dd392e12034d5d9f38356c7df8ada /drivers | |
parent | 330afdb1df0f3fb48583105493a8f4f8d9e3af36 (diff) | |
download | linux-ecd9caa0522db5a6b03ac8858c42067ef9d8323b.tar.xz |
drm/i915: Fix oopses in the overlay code due to i915_gem_active stuff
The i915_gem_active stuff doesn't like a NULL ->retire hook, but
the overlay code can set it to NULL. That obviously ends up oopsing.
Fix it by introducing a new helper to assign the retirement callback
that will switch out the NULL function pointer with
i915_gem_retire_noop.
Cc: stable@vger.kernel.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Fixes: 0d9bdd886f29 ("drm/i915: Convert intel_overlay to request tracking")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20161207175647.10018-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/drm/i915/i915_gem_request.h | 19 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/intel_overlay.c | 3 |
2 files changed, 21 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_request.h b/drivers/gpu/drm/i915/i915_gem_request.h index 8569b35a332a..ea511f06efaf 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.h +++ b/drivers/gpu/drm/i915/i915_gem_request.h @@ -402,6 +402,25 @@ i915_gem_active_set(struct i915_gem_active *active, rcu_assign_pointer(active->request, request); } +/** + * i915_gem_active_set_retire_fn - updates the retirement callback + * @active - the active tracker + * @fn - the routine called when the request is retired + * @mutex - struct_mutex used to guard retirements + * + * i915_gem_active_set_retire_fn() updates the function pointer that + * is called when the final request associated with the @active tracker + * is retired. + */ +static inline void +i915_gem_active_set_retire_fn(struct i915_gem_active *active, + i915_gem_retire_fn fn, + struct mutex *mutex) +{ + lockdep_assert_held(mutex); + active->retire = fn ?: i915_gem_retire_noop; +} + static inline struct drm_i915_gem_request * __i915_gem_active_peek(const struct i915_gem_active *active) { diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c index bcfb60cbeb05..d513a059cd09 100644 --- a/drivers/gpu/drm/i915/intel_overlay.c +++ b/drivers/gpu/drm/i915/intel_overlay.c @@ -216,7 +216,8 @@ static void intel_overlay_submit_request(struct intel_overlay *overlay, { GEM_BUG_ON(i915_gem_active_peek(&overlay->last_flip, &overlay->i915->drm.struct_mutex)); - overlay->last_flip.retire = retire; + i915_gem_active_set_retire_fn(&overlay->last_flip, retire, + &overlay->i915->drm.struct_mutex); i915_gem_active_set(&overlay->last_flip, req); i915_add_request(req); } |