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scsi: qla2xxx: use dma_mapping_error to check map errors

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The return value of dma_map_single() should be checked by
dma_mapping_error(). However, in function qla26xx_dport_diagnostics(), its
return value is checked against NULL, which could result in failures.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Pan Bian 2017-08-08 21:55:30 +08:00 committed by Martin K. Petersen
parent cf99dc30bc
commit 0b2ce198fa
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/qla2xxx/qla_mbx.c
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@ -5809,7 +5809,7 @@ qla26xx_dport_diagnostics(scsi_qla_host_t *vha,
dd_dma = dma_map_single(&vha->hw->pdev->dev,
dd_buf, size, DMA_FROM_DEVICE);
if (!dd_dma) {
if (dma_mapping_error(&vha->hw->pdev->dev, dd_dma)) {
ql_log(ql_log_warn, vha, 0x1194, "Failed to map dma buffer.\n");
return QLA_MEMORY_ALLOC_FAILED;
}