[SCSI] iscsi tcp: bidi capable

Mark iscsi_tcp as being capable of bidirectional transfers.  The
bsg interface checks this bit before attempting any bidirectional
commands.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 23808dfe22ba..5a08ca48fb3a 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -813,6 +813,12 @@ static void iscsi_sw_tcp_session_destroy(struct iscsi_cls_session *cls_session)
         iscsi_host_free(shost);
 }
 
+static int iscsi_sw_tcp_slave_alloc(struct scsi_device *sdev)
+{
+        set_bit(QUEUE_FLAG_BIDI, &sdev->request_queue->queue_flags);
+        return 0;
+}
+
 static int iscsi_sw_tcp_slave_configure(struct scsi_device *sdev)
 {
         blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_ANY);
@@ -833,6 +839,7 @@ static struct scsi_host_template iscsi_sw_tcp_sht = {
         .eh_device_reset_handler= iscsi_eh_device_reset,
         .eh_target_reset_handler= iscsi_eh_target_reset,
         .use_clustering         = DISABLE_CLUSTERING,
+        .slave_alloc            = iscsi_sw_tcp_slave_alloc,
         .slave_configure        = iscsi_sw_tcp_slave_configure,
         .proc_name              = "iscsi_tcp",
         .this_id                = -1,