diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c index 73b8ab4..f937d70 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c @@ -76,23 +76,25 @@ nvkm_fifo_channel_create_(struct nvkm_object *parent, return ret; /* validate dma object representing push buffer */ - handle = nvkm_client_search(client, pushbuf); - if (!handle) - return -ENOENT; - dmaobj = (void *)handle->object; - - dmaeng = (void *)dmaobj->base.engine; - switch (dmaobj->base.oclass->handle) { - case NV_DMA_FROM_MEMORY: - case NV_DMA_IN_MEMORY: - break; - default: - return -EINVAL; - } + if (pushbuf) { + handle = nvkm_client_search(client, pushbuf); + if (!handle) + return -ENOENT; + dmaobj = (void *)handle->object; + + dmaeng = (void *)dmaobj->base.engine; + switch (dmaobj->base.oclass->handle) { + case NV_DMA_FROM_MEMORY: + case NV_DMA_IN_MEMORY: + break; + default: + return -EINVAL; + } - ret = dmaeng->bind(dmaobj, parent, &chan->pushgpu); - if (ret) - return ret; + ret = dmaeng->bind(dmaobj, parent, &chan->pushgpu); + if (ret) + return ret; + } /* find a free fifo channel */ spin_lock_irqsave(&fifo->lock, flags); |