dmaengine: Move all map_sg/unmap_sg for slave channel to its client

[safe/jmp/linux-2.6] / drivers / mmc / host / atmel-mci.c

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 7b603e4..5e10d36 100644 (file)
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -576,6 +576,7 @@ atmci_submit_data_dma(struct atmel_mci *host, struct mmc_data *data)
        struct scatterlist              *sg;
        unsigned int                    i;
        enum dma_data_direction         direction;
+       unsigned int                    sglen;
 
        /*
         * We don't do DMA on "complex" transfers, i.e. with
@@ -605,11 +606,14 @@ atmci_submit_data_dma(struct atmel_mci *host, struct mmc_data *data)
        else
                direction = DMA_TO_DEVICE;
 
+       sglen = dma_map_sg(&host->pdev->dev, data->sg, data->sg_len, direction);
+       if (sglen != data->sg_len)
+               goto unmap_exit;
        desc = chan->device->device_prep_slave_sg(chan,
                        data->sg, data->sg_len, direction,
                        DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
        if (!desc)
-               return -ENOMEM;
+               goto unmap_exit;
 
        host->dma.data_desc = desc;
        desc->callback = atmci_dma_complete;
@@ -620,6 +624,9 @@ atmci_submit_data_dma(struct atmel_mci *host, struct mmc_data *data)
        chan->device->device_issue_pending(chan);
 
        return 0;
+unmap_exit:
+       dma_unmap_sg(&host->pdev->dev, data->sg, sglen, direction);
+       return -ENOMEM;
 }
 
 #else /* CONFIG_MMC_ATMELMCI_DMA */