From: Martin K. Petersen <martin.petersen@oracle.com>
Date: Fri, 10 Sep 2010 18:50:10 +0000 (+0200)
Subject: block/scsi: Provide a limit on the number of integrity segments
X-Git-Tag: v2.6.37-rc1~168^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13f05c8d8e98bbdce89158bfdb2e380940695a88;p=pandora-kernel.git

block/scsi: Provide a limit on the number of integrity segments

Some controllers have a hardware limit on the number of protection
information scatter-gather list segments they can handle.

Introduce a max_integrity_segments limit in the block layer and provide
a new scsi_host_template setting that allows HBA drivers to provide a
value suitable for the hardware.

Add support for honoring the integrity segment limit when merging both
bios and requests.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
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