Merge branch 'for-linus' of git://neil.brown.name/md
[linux-2.6.git] / drivers / mmc / host / atmel-mci.c
index 065fa818be5750a8b59dc7d12a53cb217933b5d0..fc25586b7ee1c94575e5674f89c3382c2a7ffd88 100644 (file)
@@ -599,6 +599,7 @@ 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
@@ -628,11 +629,14 @@ 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;
@@ -643,6 +647,9 @@ 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 */