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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-07 02:18:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-07 02:18:14 +0000 |
| commit | 3a4516e9d4e52a1e1c49f9c269b6e702ef586047 (patch) | |
| tree | 0e12fabd3a7d77e4d0bb956b670df8a1062abf7e /drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c | |
| parent | Releasing progress-linux version 6.1.85-1progress7u1. (diff) | |
| download | linux-3a4516e9d4e52a1e1c49f9c269b6e702ef586047.tar.xz linux-3a4516e9d4e52a1e1c49f9c269b6e702ef586047.zip | |
Merging upstream version 6.1.90.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c index c51bac761..9fe5b6a36 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c @@ -221,8 +221,11 @@ nv50_instobj_acquire(struct nvkm_memory *memory) void __iomem *map = NULL; /* Already mapped? */ - if (refcount_inc_not_zero(&iobj->maps)) + if (refcount_inc_not_zero(&iobj->maps)) { + /* read barrier match the wmb on refcount set */ + smp_rmb(); return iobj->map; + } /* Take the lock, and re-check that another thread hasn't * already mapped the object in the meantime. @@ -249,6 +252,8 @@ nv50_instobj_acquire(struct nvkm_memory *memory) iobj->base.memory.ptrs = &nv50_instobj_fast; else iobj->base.memory.ptrs = &nv50_instobj_slow; + /* barrier to ensure the ptrs are written before refcount is set */ + smp_wmb(); refcount_set(&iobj->maps, 1); } |