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| author | Maarten Lankhorst <maarten.lankhorst@canonical.com> | 2013-08-12 12:41:34 +0200 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2013-08-21 11:35:53 +1000 |
| commit | 18902bbf06a93ea497be2f177a6323ed9e5f30be (patch) | |
| tree | 254ccd90d052c96f45bfa1857267997d8d40d5d1 | |
| parent | 52f9a4d71b5ba980ea72013191e907127bc44eeb (diff) | |
| download | testing-18902bbf06a93ea497be2f177a6323ed9e5f30be.tar.gz | |
drm/nouveau/ltcg: fix allocating memory as free
Allocating type=0 marks the memory as free. This allows the ltcg memory
to be allocated twice.
Add a BUG_ON in core/mm.c to prevent this ever happening again.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/core/mm.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/core/core/mm.c b/drivers/gpu/drm/nouveau/core/core/mm.c index d8291724dbd47d..7a4e0891c5f872 100644 --- a/drivers/gpu/drm/nouveau/core/core/mm.c +++ b/drivers/gpu/drm/nouveau/core/core/mm.c @@ -98,6 +98,8 @@ nouveau_mm_head(struct nouveau_mm *mm, u8 type, u32 size_max, u32 size_min, u32 splitoff; u32 s, e; + BUG_ON(!type); + list_for_each_entry(this, &mm->free, fl_entry) { e = this->offset + this->length; s = this->offset; @@ -162,6 +164,8 @@ nouveau_mm_tail(struct nouveau_mm *mm, u8 type, u32 size_max, u32 size_min, struct nouveau_mm_node *prev, *this, *next; u32 mask = align - 1; + BUG_ON(!type); + list_for_each_entry_reverse(this, &mm->free, fl_entry) { u32 e = this->offset + this->length; u32 s = this->offset; diff --git a/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c index ee2a0beef5e6d5..cce65cc565145c 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c +++ b/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c @@ -139,7 +139,7 @@ nvc0_ltcg_init_tag_ram(struct nouveau_fb *pfb, struct nvc0_ltcg_priv *priv) tag_size += tag_align; tag_size = (tag_size + 0xfff) >> 12; /* round up */ - ret = nouveau_mm_tail(&pfb->vram, 0, tag_size, tag_size, 1, + ret = nouveau_mm_tail(&pfb->vram, 1, tag_size, tag_size, 1, &priv->tag_ram); if (ret) { priv->num_tags = 0; |