tree 660a37a0ab5e90cda0ed1433570e2ec49a10114c
parent 92dc689563170b90ba844b8a2eb95e8a5eda2e83
author Akinobu Mita <akinobu.mita@gmail.com> 1504692931 +0200
committer Christoph Hellwig <hch@lst.de> 1505147378 -0400

nvme-pci: use appropriate initial chunk size for HMB allocation

The initial chunk size for host memory buffer allocation is currently
PAGE_SIZE << MAX_ORDER.  MAX_ORDER order allocation is usually failed
without CONFIG_DMA_CMA.  So the HMB allocation is retried with chunk size
PAGE_SIZE << (MAX_ORDER - 1) in general, but there is no problem if the
retry allocation works correctly.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
[hch: rebased]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Cc: stable@vger.kernel.org