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drm/nouveau/acr: return error when registering LSF if ACR not supported

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This fixes an oops on TU11x GPUs where SEC2 attempts to register its falcon,
and triggers a NULL-pointer deref because ACR isn't yet supported.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2020-01-29 11:20:34 +10:00
parent 86e18ebd87
commit 1c338ed5e5
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/nouveau/nvkm/subdev/acr/lsfw.c
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@ -58,8 +58,12 @@ struct nvkm_acr_lsfw *
nvkm_acr_lsfw_add(const struct nvkm_acr_lsf_func *func, struct nvkm_acr *acr,
struct nvkm_falcon *falcon, enum nvkm_acr_lsf_id id)
{
struct nvkm_acr_lsfw *lsfw = nvkm_acr_lsfw_get(acr, id);
struct nvkm_acr_lsfw *lsfw;
if (!acr)
return ERR_PTR(-ENOSYS);
lsfw = nvkm_acr_lsfw_get(acr, id);
if (lsfw && lsfw->func) {
nvkm_error(&acr->subdev, "LSFW %d redefined\n", id);
return ERR_PTR(-EEXIST);