IB/iser: Limit the max size of a scsi command

Currently, the data length of a command coming down from scsi-ml
is limited only by the size of its sg list (sg_tablesize). The
max data length may be different for different page size values.
By setting max_sectors, we limit the data length to
max_sectors*512 bytes.

Signed-off-by: Erez Zilber <erezz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 1437d7e..e9cf1a9 100644 (file)
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -555,6 +555,7 @@ static struct scsi_host_template iscsi_iser_sht = {
        .queuecommand           = iscsi_queuecommand,
        .can_queue              = ISCSI_XMIT_CMDS_MAX - 1,
        .sg_tablesize           = ISCSI_ISER_SG_TABLESIZE,
+       .max_sectors            = 1024,
        .cmd_per_lun            = ISCSI_MAX_CMD_PER_LUN,
        .eh_abort_handler       = iscsi_eh_abort,
        .eh_host_reset_handler  = iscsi_eh_host_reset,