mmc: bcm2835: Properly handle dmaengine_prep_slave_sg
In case dmaengine_prep_slave_sg fails we need to call dma_unmap_sg. Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Acked-by: Eric Anholt <eric@anholt.net> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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2f5da67835
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@ -507,14 +507,17 @@ void bcm2835_prepare_dma(struct bcm2835_host *host, struct mmc_data *data)
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desc = dmaengine_prep_slave_sg(dma_chan, data->sg, sg_len, dir_slave,
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DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
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if (desc) {
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if (!desc) {
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dma_unmap_sg(dma_chan->device->dev, data->sg, sg_len, dir_data);
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return;
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}
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desc->callback = bcm2835_dma_complete;
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desc->callback_param = host;
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host->dma_desc = desc;
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host->dma_chan = dma_chan;
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host->dma_dir = dir_data;
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}
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}
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static void bcm2835_start_dma(struct bcm2835_host *host)
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{
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