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drm/msm: Remove obj->gpu

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It cannot be atomically updated with obj->active_count, and the only
purpose is a useless WARN_ON() (which becomes a buggy WARN_ON() once
retire_submits() is not serialized with incoming submits via
struct_mutex)

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark 2020-10-23 09:51:18 -07:00
parent 964d2f97e7
commit fb1a1fcbac
3 changed files with 0 additions and 8 deletions
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2
drivers/gpu/drm/msm/msm_gem.c
View File

@ -774,7 +774,6 @@ void msm_gem_active_get(struct drm_gem_object *obj, struct msm_gpu *gpu)
if (!atomic_fetch_inc(&msm_obj->active_count)) {
mutex_lock(&priv->mm_lock);
msm_obj->gpu = gpu;
list_del_init(&msm_obj->mm_list);
list_add_tail(&msm_obj->mm_list, &gpu->active_list);
mutex_unlock(&priv->mm_lock);
@ -790,7 +789,6 @@ void msm_gem_active_put(struct drm_gem_object *obj)
if (!atomic_dec_return(&msm_obj->active_count)) {
mutex_lock(&priv->mm_lock);
msm_obj->gpu = NULL;
list_del_init(&msm_obj->mm_list);
list_add_tail(&msm_obj->mm_list, &priv->inactive_list);
mutex_unlock(&priv->mm_lock);

1
drivers/gpu/drm/msm/msm_gem.h
View File

@ -64,7 +64,6 @@ struct msm_gem_object {
*
*/
struct list_head mm_list;
struct msm_gpu *gpu; /* non-null if active */
/* Transiently in the process of submit ioctl, objects associated
* with the submit are on submit->bo_list.. this only lasts for

5
drivers/gpu/drm/msm/msm_gpu.c
View File

@ -805,11 +805,6 @@ void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
struct drm_gem_object *drm_obj = &msm_obj->base;
uint64_t iova;
/* can't happen yet.. but when we add 2d support we'll have
* to deal w/ cross-ring synchronization:
*/
WARN_ON(is_active(msm_obj) && (msm_obj->gpu != gpu));
/* submit takes a reference to the bo and iova until retired: */
drm_gem_object_get(&msm_obj->base);
msm_gem_get_and_pin_iova_locked(&msm_obj->base, submit->aspace, &iova);