On 5/3/21 10:19 AM, Logan Gunthorpe wrote:
...
+ nr_mapped = dma_map_sg_p2pdma_attrs(dev->dev, iod->sg, iod->nents,
+ rq_dma_dir(req), DMA_ATTR_NO_WARN);
+ if (nr_mapped < 0) {
+ if (nr_mapped != -ENOMEM)
+ ret = BLK_STS_TARGET;
goto out_free_sg;
+ }
But now the "nr_mapped == 0" case is no longer doing an early out_free_sg.
Is that OK?
dma_map_sg_p2pdma_attrs() never returns zero. It will return -ENOMEM in
the same situation and results in the same goto out_free_sg.
OK...that's true, it doesn't return zero. A comment or WARN or something
might be nice, to show that the zero case hasn't been overlooked. It's
true that the dma_map_sg_p2pdma_attrs() documentation sort of says
that (although not quite out loud).
thanks,
--
John Hubbard
NVIDIA
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