Check DMA memory before it is unmapped.
Signed-off-by: John Soni Jose <sony.john-n@xxxxxxxxxx>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@xxxxxxxxxx>
---
drivers/scsi/be2iscsi/be_main.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index dca3a55..1fbbece 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -1368,8 +1368,10 @@ be_complete_io(struct beiscsi_conn *beiscsi_conn,
if (io_task->cmd_bhs->iscsi_hdr.flags & ISCSI_FLAG_CMD_READ)
conn->rxdata_octets += resid;
unmap:
- scsi_dma_unmap(io_task->scsi_cmnd);
- io_task->scsi_cmnd = NULL;
+ if (io_task->scsi_cmnd) {
+ scsi_dma_unmap(io_task->scsi_cmnd);
+ io_task->scsi_cmnd = NULL;
+ }
iscsi_complete_scsi_task(task, exp_cmdsn, max_cmdsn);
}
@@ -4609,11 +4611,13 @@ beiscsi_free_mgmt_task_handles(struct beiscsi_conn *beiscsi_conn,
spin_unlock_bh(&phba->mgmt_sgl_lock);
}
- if (io_task->mtask_addr)
+ if (io_task->mtask_addr) {
pci_unmap_single(phba->pcidev,
io_task->mtask_addr,
io_task->mtask_data_count,
PCI_DMA_TODEVICE);
+ io_task->mtask_addr = 0;
+ }
}
/**
--
1.7.1
--
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