From eb1c46924dfb48489272e8dc561bed9693e143d4 Mon Sep 17 00:00:00 2001 From: John Soni Jose Date: Sat, 25 Apr 2015 08:17:45 +0530 Subject: be2iscsi : Fix memory check before unmapping. Check DMA memory before it is unmapped. Signed-off-by: John Soni Jose Signed-off-by: Jayamohan Kallickal Reviewed-by: Mike Christie Signed-off-by: James Bottomley --- drivers/scsi/be2iscsi/be_main.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index 7212bb47c075..65108370bfef 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; + } } /** -- cgit v1.2.3