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coresight: tmc-etr: fix etr smmu unmap issue

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The return value 0 of dma_map_resource() is valid, so should use
the dma_mapping_error() to check for errors.

Change-Id: I368f480ed66bad0498e38da2fc6baa78b5935d7f
Signed-off-by: Yuanfang Zhang <zhangyuanfang@codeaurora.org>
This commit is contained in:
Yuanfang Zhang
2020-04-22 16:04:21 +08:00
parent 4945d76d49
commit 014fc527b8
1 changed files with 3 additions and 3 deletions
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6
drivers/hwtracing/coresight/coresight-tmc-etr.c
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@@ -1162,7 +1162,7 @@ static int tmc_etr_fill_usb_bam_data(struct tmc_drvdata *drvdata)
data_fifo_iova = dma_map_resource(drvdata->dev,
bamdata->data_fifo.phys_base, bamdata->data_fifo.size,
DMA_BIDIRECTIONAL, 0);
if (!data_fifo_iova)
if (dma_mapping_error(drvdata->dev, data_fifo_iova))
return -ENOMEM;
dev_dbg(drvdata->dev, "%s:data p_addr:%pa,iova:%pad,size:%x\n",
__func__, &(bamdata->data_fifo.phys_base),
@@ -1171,7 +1171,7 @@ static int tmc_etr_fill_usb_bam_data(struct tmc_drvdata *drvdata)
desc_fifo_iova = dma_map_resource(drvdata->dev,
bamdata->desc_fifo.phys_base, bamdata->desc_fifo.size,
DMA_BIDIRECTIONAL, 0);
if (!desc_fifo_iova)
if (dma_mapping_error(drvdata->dev, desc_fifo_iova))
return -ENOMEM;
dev_dbg(drvdata->dev, "%s:desc p_addr:%pa,iova:%pad,size:%x\n",
__func__, &(bamdata->desc_fifo.phys_base),
@@ -1243,7 +1243,7 @@ static int get_usb_bam_iova(struct device *dev, unsigned long usb_bam_handle,
return ret;
}
*iova = dma_map_resource(dev, p_addr, bam_size, DMA_BIDIRECTIONAL, 0);
if (!(*iova))
if (dma_mapping_error(dev, *iova))
return -ENOMEM;
return 0;
}