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drm/nouveau/pm: prevent creating a perfctr object when signals are not found 

Since a new class has been introduced to query signals, we can now
return an error when the userspace wants to monitor unknown signals.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Samuel Pitoiset 2015-06-07 22:40:16 +02:00 committed by Ben Skeggs
parent 5a0bc4b5ae
commit 44d9de58ea
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/nouveau/nvkm/engine/pm/base.c
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@ -294,6 +294,9 @@ nvkm_perfctr_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
return -EINVAL;
}
if (!dom)
return -EINVAL;
ret = nvkm_object_create(parent, engine, oclass, 0, &ctr);
*pobject = nv_object(ctr);
if (ret)
@ -305,8 +308,7 @@ nvkm_perfctr_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
ctr->signal[1] = sig[1];
ctr->signal[2] = sig[2];
ctr->signal[3] = sig[3];
if (dom)
list_add_tail(&ctr->head, &dom->list);
list_add_tail(&ctr->head, &dom->list);
return 0;
}