Commit dceef5d87 (drm/nouveau/fb: initialise vram controller as pfb sub-object) moved some code around and introduced these null derefs. pfb->ram is set to the new ram object outside of this ctor.

Reported-by: Ronald Uitermark ronald645@gmail.com Tested-by: Ronald Uitermark ronald645@gmail.com Signed-off-by: Ilia Mirkin imirkin@alum.mit.edu --- drivers/gpu/drm/nouveau/core/subdev/fb/ramnv49.c | 12 ++++++------ drivers/gpu/drm/nouveau/core/subdev/fb/ramnv4e.c | 4 ++-- 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv49.c b/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv49.c index 19e3a9a..ab7ef0a 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv49.c +++ b/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv49.c @@ -40,15 +40,15 @@ nv49_ram_create(struct nouveau_object *parent, struct nouveau_object *engine, return ret;

switch (pfb914 & 0x00000003) { - case 0x00000000: pfb->ram->type = NV_MEM_TYPE_DDR1; break; - case 0x00000001: pfb->ram->type = NV_MEM_TYPE_DDR2; break; - case 0x00000002: pfb->ram->type = NV_MEM_TYPE_GDDR3; break; + case 0x00000000: ram->type = NV_MEM_TYPE_DDR1; break; + case 0x00000001: ram->type = NV_MEM_TYPE_DDR2; break; + case 0x00000002: ram->type = NV_MEM_TYPE_GDDR3; break; case 0x00000003: break; }

- pfb->ram->size = nv_rd32(pfb, 0x10020c) & 0xff000000; - pfb->ram->parts = (nv_rd32(pfb, 0x100200) & 0x00000003) + 1; - pfb->ram->tags = nv_rd32(pfb, 0x100320); + ram->size = nv_rd32(pfb, 0x10020c) & 0xff000000; + ram->parts = (nv_rd32(pfb, 0x100200) & 0x00000003) + 1; + ram->tags = nv_rd32(pfb, 0x100320); return 0; }

diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv4e.c b/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv4e.c index 7192aa6..63a6aab 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv4e.c +++ b/drivers/gpu/drm/nouveau/core/subdev/fb/ramnv4e.c @@ -38,8 +38,8 @@ nv4e_ram_create(struct nouveau_object *parent, struct nouveau_object *engine, if (ret) return ret;

- pfb->ram->size = nv_rd32(pfb, 0x10020c) & 0xff000000; - pfb->ram->type = NV_MEM_TYPE_STOLEN; + ram->size = nv_rd32(pfb, 0x10020c) & 0xff000000; + ram->type = NV_MEM_TYPE_STOLEN; return 0; }