tree 055215e7e2b1bdc684ead64daa61b30b35eaa3c5
parent c8bf1336824ebd698d37b71763e1c43190f2229a
author Martin K. Petersen <martin.petersen@oracle.com> 1284144610 +0200
committer Jens Axboe <axboe@carl.home.kernel.dk> 1284144610 +0200

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>