[SCSI] add use_sg_chaining option to scsi_host_template

This option is true if a low-level driver can support sg
chaining. This will be removed eventually when all the drivers are
converted to support sg chaining. q->max_phys_segments is set to
SCSI_MAX_SG_SEGMENTS if false.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/scsi/aha1740.c b/drivers/scsi/aha1740.c
index e4a4f3a965d9..f6722fd46008 100644
--- a/drivers/scsi/aha1740.c
+++ b/drivers/scsi/aha1740.c
@@ -563,6 +563,7 @@ static struct scsi_host_template aha1740_template = {
         .sg_tablesize     = AHA1740_SCATTER,
         .cmd_per_lun      = AHA1740_CMDLUN,
         .use_clustering   = ENABLE_CLUSTERING,
+        .use_sg_chaining  = ENABLE_SG_CHAINING,
         .eh_abort_handler = aha1740_eh_abort_handler,
 };