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| author | Maxime Ripard <maxime@cerno.tech> | 2023-01-12 12:12:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-01 10:34:09 +0300 |
| commit | be960b061b894dc7e47c56e5784b04ba44c67107 (patch) | |
| tree | 5116e09d1f3c879986c37ce05eb97ba45baefd5e /drivers | |
| parent | 86e1955b28d9211c8faa8946387951792aeba44d (diff) | |
| download | linux-be960b061b894dc7e47c56e5784b04ba44c67107.tar.xz | |
drm/vc4: bo: Fix drmm_mutex_init memory hog
[ Upstream commit 07a2975c65f2be2e22591d795a9c39b00f95fd11 ]
Commit 374146cad469 ("drm/vc4: Switch to drmm_mutex_init") converted,
among other functions, vc4_create_object() to use drmm_mutex_init().
However, that function is used to allocate a BO, and therefore the
mutex needs to be freed much sooner than when the DRM device is removed
from the system.
For each buffer allocation we thus end up allocating a small structure
as part of the DRM-managed mechanism that is never freed, eventually
leading us to no longer having any free memory anymore.
Let's switch back to mutex_init/mutex_destroy to deal with it properly.
Fixes: 374146cad469 ("drm/vc4: Switch to drmm_mutex_init")
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20230112091243.490799-1-maxime@cerno.tech
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_bo.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c index 231add8b8e12..ab2573525d77 100644 --- a/drivers/gpu/drm/vc4/vc4_bo.c +++ b/drivers/gpu/drm/vc4/vc4_bo.c @@ -179,6 +179,7 @@ static void vc4_bo_destroy(struct vc4_bo *bo) bo->validated_shader = NULL; } + mutex_destroy(&bo->madv_lock); drm_gem_dma_free(&bo->base); } @@ -406,9 +407,7 @@ struct drm_gem_object *vc4_create_object(struct drm_device *dev, size_t size) bo->madv = VC4_MADV_WILLNEED; refcount_set(&bo->usecnt, 0); - ret = drmm_mutex_init(dev, &bo->madv_lock); - if (ret) - return ERR_PTR(ret); + mutex_init(&bo->madv_lock); mutex_lock(&vc4->bo_lock); bo->label = VC4_BO_TYPE_KERNEL; |