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>
This commit is contained in:
Stefan Wahren 2018-11-11 21:23:59 +01:00 коммит произвёл Ulf Hansson
Родитель 6dc6f26190
Коммит 2f5da67835
1 изменённых файлов: 9 добавлений и 6 удалений

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@ -507,13 +507,16 @@ void bcm2835_prepare_dma(struct bcm2835_host *host, struct mmc_data *data)
desc = dmaengine_prep_slave_sg(dma_chan, data->sg, sg_len, dir_slave, desc = dmaengine_prep_slave_sg(dma_chan, data->sg, sg_len, dir_slave,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK); DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (desc) { if (!desc) {
dma_unmap_sg(dma_chan->device->dev, data->sg, sg_len, dir_data);
return;
}
desc->callback = bcm2835_dma_complete; desc->callback = bcm2835_dma_complete;
desc->callback_param = host; desc->callback_param = host;
host->dma_desc = desc; host->dma_desc = desc;
host->dma_chan = dma_chan; host->dma_chan = dma_chan;
host->dma_dir = dir_data; host->dma_dir = dir_data;
}
} }
static void bcm2835_start_dma(struct bcm2835_host *host) static void bcm2835_start_dma(struct bcm2835_host *host)