From: Keith Busch <keith.busch@intel.com>
Date: Fri, 19 Jun 2015 17:07:30 +0000 (-0600)
Subject: NVMe: Fix IO for extended metadata formats
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~148^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71feb364e7faadc681e714f7fdc2bede208ba26c;p=pandora-kernel.git

NVMe: Fix IO for extended metadata formats

This fixes io submit ioctl handling when using extended metadata
formats. When these formats are used, the user provides a single virtually
contiguous buffer containing both the block and metadata interleaved,
so the metadata size needs to be added to the total length and not mapped
as a separate transfer.

The command is also driver generated, so this patch does not enforce
blk-integrity extensions provide the metadata buffer.

Reported-by: Marcin Dziegielewski <marcin.dziegielewski@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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