[PATCH 04/17] mpi3mr: Fix target device reference leak in BSG task management

[Chandrakanth Patil <chandrakanth.patil@broadcom.com>]

The target device lookup takes a reference, but it is only dropped
inside a branch that also requires the SCSI target data to be set up.
When it is not, the reference is leaked.

Drop the reference whenever the lookup succeeded.

Fixes: 506bc1a0d6ba ("scsi: mpi3mr: Add support for MPT commands")
Signed-off-by: Chandrakanth Patil <chandrakanth.patil@broadcom.com>
---
 drivers/scsi/mpi3mr/mpi3mr_app.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/mpi3mr/mpi3mr_app.c b/drivers/scsi/mpi3mr/mpi3mr_app.c
index a4fe10a05cb3..94b992acb233 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_app.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_app.c
@@ -2745,10 +2745,12 @@ static long mpi3mr_bsg_process_mpt_cmds(struct bsg_job *job)
 	}
 	if (block_io) {
 		tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, dev_handle);
-		if (tgtdev && tgtdev->starget && tgtdev->starget->hostdata) {
-			stgt_priv = (struct mpi3mr_stgt_priv_data *)
-			    tgtdev->starget->hostdata;
-			atomic_inc(&stgt_priv->block_io);
+		if (tgtdev) {
+			if (tgtdev->starget && tgtdev->starget->hostdata) {
+				stgt_priv = (struct mpi3mr_stgt_priv_data *)
+				    tgtdev->starget->hostdata;
+				atomic_inc(&stgt_priv->block_io);
+			}
 			mpi3mr_tgtdev_put(tgtdev);
 		}
 	}