diff options
Diffstat (limited to 'drivers/spi/spi-pxa2xx-dma.c')
| -rw-r--r-- | drivers/spi/spi-pxa2xx-dma.c | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c index 365fc22c3572..a18a03d0afb7 100644 --- a/drivers/spi/spi-pxa2xx-dma.c +++ b/drivers/spi/spi-pxa2xx-dma.c @@ -33,12 +33,10 @@ static int pxa2xx_spi_map_dma_buffer(struct driver_data *drv_data, dmadev = drv_data->tx_chan->device->dev; sgt = &drv_data->tx_sgt; buf = drv_data->tx; - drv_data->tx_map_len = len; } else { dmadev = drv_data->rx_chan->device->dev; sgt = &drv_data->rx_sgt; buf = drv_data->rx; - drv_data->rx_map_len = len; } nents = DIV_ROUND_UP(len, SZ_2K); @@ -55,11 +53,7 @@ static int pxa2xx_spi_map_dma_buffer(struct driver_data *drv_data, for_each_sg(sgt->sgl, sg, sgt->nents, i) { size_t bytes = min_t(size_t, len, SZ_2K); - if (buf) - sg_set_buf(sg, pbuf, bytes); - else - sg_set_buf(sg, drv_data->dummy, bytes); - + sg_set_buf(sg, pbuf, bytes); pbuf += bytes; len -= bytes; } @@ -133,9 +127,6 @@ static void pxa2xx_spi_dma_transfer_complete(struct driver_data *drv_data, if (!error) { pxa2xx_spi_unmap_dma_buffers(drv_data); - drv_data->tx += drv_data->tx_map_len; - drv_data->rx += drv_data->rx_map_len; - msg->actual_length += drv_data->len; msg->state = pxa2xx_spi_next_transfer(drv_data); } else { @@ -267,19 +258,22 @@ irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data) int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, u32 dma_burst) { struct dma_async_tx_descriptor *tx_desc, *rx_desc; + int err = 0; tx_desc = pxa2xx_spi_dma_prepare_one(drv_data, DMA_MEM_TO_DEV); if (!tx_desc) { dev_err(&drv_data->pdev->dev, "failed to get DMA TX descriptor\n"); - return -EBUSY; + err = -EBUSY; + goto err_tx; } rx_desc = pxa2xx_spi_dma_prepare_one(drv_data, DMA_DEV_TO_MEM); if (!rx_desc) { dev_err(&drv_data->pdev->dev, "failed to get DMA RX descriptor\n"); - return -EBUSY; + err = -EBUSY; + goto err_rx; } /* We are ready when RX completes */ @@ -289,6 +283,12 @@ int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, u32 dma_burst) dmaengine_submit(rx_desc); dmaengine_submit(tx_desc); return 0; + +err_rx: + dmaengine_terminate_async(drv_data->tx_chan); +err_tx: + pxa2xx_spi_unmap_dma_buffers(drv_data); + return err; } void pxa2xx_spi_dma_start(struct driver_data *drv_data) @@ -308,10 +308,6 @@ int pxa2xx_spi_dma_setup(struct driver_data *drv_data) dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - drv_data->dummy = devm_kzalloc(dev, SZ_2K, GFP_KERNEL); - if (!drv_data->dummy) - return -ENOMEM; - drv_data->tx_chan = dma_request_slave_channel_compat(mask, pdata->dma_filter, pdata->tx_param, dev, "tx"); if (!drv_data->tx_chan) |