From e977659d2f2a9f740bfb740afe48c3e6765ef0fe Mon Sep 17 00:00:00 2001
From: Himanshu Madhani <hmadhani@redhat.com>
Date: Thu, 1 Aug 2019 15:56:08 -0400
Subject: [PATCH 108/124] [scsi] scsi: qla2xxx: Fix DMA unmap leak
Message-id: <20190801155618.12650-109-hmadhani@redhat.com>
Patchwork-id: 267882
O-Subject: [RHEL 7.8 e-stor PATCH 108/118] scsi: qla2xxx: Fix DMA unmap leak
Bugzilla: 1729270
RH-Acked-by: Jarod Wilson <jarod@redhat.com>
RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
From: Himanshu Madhani <hmadhani@marvell.com>
Bugzilla 1729270
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 <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 5d328de64d89400dcf9911125844d8adc0db697f)
Signed-off-by: Himanshu Madhani <hmadhani@redhat.com>
Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
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 783541fec019..c59a56aa626b 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -333,6 +333,8 @@ qla2x00_process_els(struct fc_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;
}
@@ -340,6 +342,8 @@ qla2x00_process_els(struct fc_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;
}
--
2.13.6