From bd9138ac3ff56b72dc742563eadbf6753d71768a Mon Sep 17 00:00:00 2001 From: Himanshu Madhani Date: Fri, 26 Jul 2019 09:07:26 -0700 Subject: [PATCH] scsi: qla2xxx: Fix DMA unmap leak [ Upstream commit 5d328de64d89400dcf9911125844d8adc0db697f ] With debug kernel we see following wanings indicating memory leak. [28809.523959] WARNING: CPU: 3 PID: 6790 at lib/dma-debug.c:978 dma_debug_device_change+0x166/0x1d0 [28809.523964] pci 0000:0c:00.6: DMA-API: device driver has pending DMA allocations while released from device [count=5] [28809.523964] One of leaked entries details: [device address=0x00000002aefe4000] [size=8208 bytes] [mapped with DMA_BIDIRECTIONAL] [mapped as coherent] Fix this by unmapping DMA memory. Signed-off-by: Quinn Tran Signed-off-by: Himanshu Madhani Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/qla2xxx/qla_bsg.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c index 85b03a7f473c..b68a708c6725 100644 --- a/drivers/scsi/qla2xxx/qla_bsg.c +++ b/drivers/scsi/qla2xxx/qla_bsg.c @@ -342,6 +342,8 @@ qla2x00_process_els(struct bsg_job *bsg_job) dma_map_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list, bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE); if (!req_sg_cnt) { + dma_unmap_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list, + bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE); rval = -ENOMEM; goto done_free_fcport; } @@ -349,6 +351,8 @@ qla2x00_process_els(struct bsg_job *bsg_job) rsp_sg_cnt = dma_map_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list, bsg_job->reply_payload.sg_cnt, DMA_FROM_DEVICE); if (!rsp_sg_cnt) { + dma_unmap_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list, + bsg_job->reply_payload.sg_cnt, DMA_FROM_DEVICE); rval = -ENOMEM; goto done_free_fcport; } -- 2.11.0