From: Quinn Tran <qtran@marvall.com>
Date: Thu, 24 Jan 2019 23:23:47 -0800
Subject: [PATCH] scsi: qla2xxx: Prevent memory leak for CT req/rsp allocation
Git-commit: 5e85f6df77223f69e738b815558ca01e6891a173
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git
Patch-mainline: Queued in subsystem maintainer repository
References: bsc#1124541

This patch fixes memory leak by releasing DMA memory in case CT request and
response allocation fails.

Signed-off-by: Quinn Tran <qtran@marvall.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 drivers/scsi/qla2xxx/qla_gs.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 90cfa394f942..4aada6b37076 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -4157,7 +4157,8 @@ int qla24xx_async_gpnft(scsi_qla_host_t *vha, u8 fc4_type, srb_t *sp)
 			spin_lock_irqsave(&vha->work_lock, flags);
 			vha->scan.scan_flags &= ~SF_SCANNING;
 			spin_unlock_irqrestore(&vha->work_lock, flags);
-			goto done_free_sp;
+			qla2x00_rel_sp(sp);
+			return rval;
 		}
 		sp->u.iocb_cmd.u.ctarg.req_size = GPN_FT_REQ_SIZE;
 
@@ -4175,7 +4176,13 @@ int qla24xx_async_gpnft(scsi_qla_host_t *vha, u8 fc4_type, srb_t *sp)
 			spin_lock_irqsave(&vha->work_lock, flags);
 			vha->scan.scan_flags &= ~SF_SCANNING;
 			spin_unlock_irqrestore(&vha->work_lock, flags);
-			goto done_free_sp;
+			dma_free_coherent(&vha->hw->pdev->dev,
+			    sp->u.iocb_cmd.u.ctarg.req_allocated_size,
+			    sp->u.iocb_cmd.u.ctarg.req,
+			    sp->u.iocb_cmd.u.ctarg.req_dma);
+			sp->u.iocb_cmd.u.ctarg.req = NULL;
+			qla2x00_rel_sp(sp);
+			return rval;
 		}
 		sp->u.iocb_cmd.u.ctarg.rsp_size = rspsz;
 
-- 
2.16.4