drm/nouveau/nouveau/hmm: fix nouveau_dmem_chunk allocations
In nouveau_dmem_init(), a number of struct nouveau_dmem_chunk are allocated and put on the dmem->chunk_empty list. Then in nouveau_dmem_pages_alloc(), a nouveau_dmem_chunk is removed from the list and GPU memory is allocated. However, the nouveau_dmem_chunk is never removed from the chunk_empty list nor placed on the chunk_free or chunk_full lists. This results in only one chunk ever being actually used (2MB) and quickly leads to migration to device private memory failures. Fix this by having just one list of free device private pages and if no pages are free, allocate a chunk of device private pages and GPU memory. Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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