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target: Don't allocate pages for NULLIO devices

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Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Andy Grover 2013-05-28 16:55:21 -07:00 committed by Nicholas Bellinger
parent db5d1c3ccc
commit 670caa9f76
1 changed files with 5 additions and 0 deletions
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5
drivers/target/target_core_rd.c
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@ -139,6 +139,11 @@ static int rd_build_device_space(struct rd_dev *rd_dev)
rd_dev->rd_page_count);
return -EINVAL;
}
/* Don't need backing pages for NULLIO */
if (rd_dev->rd_flags & RDF_NULLIO)
return 0;
total_sg_needed = rd_dev->rd_page_count;
sg_tables = (total_sg_needed / max_sg_per_table) + 1;