https://github.com/torvalds/linux
Revision a48bc520011ea7a701826a9e3a770b128f283328 authored by Christoph Hellwig on 05 June 2019, 19:08:24 UTC, committed by Jens Axboe on 05 June 2019, 19:18:39 UTC
NVMe uses PRPs (or optionally unlimited SGLs) for data transfers and
has no specific limit for a single DMA segement.  Limiting the size
will cause problems because the block layer assumes PRP-ish devices
using a virt boundary mask don't have a segment limit.  And while this
is true, we also really need to tell the DMA mapping layer about it,
otherwise dma-debug will trip over it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent 98d669b
History
Tip revision: a48bc520011ea7a701826a9e3a770b128f283328 authored by Christoph Hellwig on 05 June 2019, 19:08:24 UTC
nvme-pci: don't limit DMA segement size
Tip revision: a48bc52
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.clang-format -rw-r--r-- 14.6 KB
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 71 bytes
.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.6 KB
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COPYING -rw-r--r-- 423 bytes
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README -rw-r--r-- 727 bytes

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