diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/atmel-mci.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index 7b603e4b41db..5e10d3663ab5 100644 --- 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 */ |