dws->rxchan = dma_request_channel(mask, mid_spi_dma_chan_filter, rx);
if (!dws->rxchan)
goto err_exit;
- dws->master->dma_rx = dws->rxchan;
/* 2. Init tx channel */
tx->dma_dev = &dma_dev->dev;
dws->txchan = dma_request_channel(mask, mid_spi_dma_chan_filter, tx);
if (!dws->txchan)
goto free_rxchan;
+
+ dws->master->dma_rx = dws->rxchan;
dws->master->dma_tx = dws->txchan;
- dws->dma_inited = 1;
return 0;
free_rxchan:
dma_release_channel(dws->rxchan);
+ dws->rxchan = NULL;
err_exit:
return -EBUSY;
}
dws->rxchan = dma_request_slave_channel(dev, "rx");
if (!dws->rxchan)
return -ENODEV;
- dws->master->dma_rx = dws->rxchan;
dws->txchan = dma_request_slave_channel(dev, "tx");
if (!dws->txchan) {
dma_release_channel(dws->rxchan);
+ dws->rxchan = NULL;
return -ENODEV;
}
+
+ dws->master->dma_rx = dws->rxchan;
dws->master->dma_tx = dws->txchan;
- dws->dma_inited = 1;
return 0;
}
static void mid_spi_dma_exit(struct dw_spi *dws)
{
- if (!dws->dma_inited)
- return;
-
- dmaengine_terminate_sync(dws->txchan);
- dma_release_channel(dws->txchan);
+ if (dws->txchan) {
+ dmaengine_terminate_sync(dws->txchan);
+ dma_release_channel(dws->txchan);
+ }
- dmaengine_terminate_sync(dws->rxchan);
- dma_release_channel(dws->rxchan);
+ if (dws->rxchan) {
+ dmaengine_terminate_sync(dws->rxchan);
+ dma_release_channel(dws->rxchan);
+ }
}
static irqreturn_t dma_transfer(struct dw_spi *dws)
{
struct dw_spi *dws = spi_controller_get_devdata(master);
- if (!dws->dma_inited)
- return false;
-
return xfer->len > dws->fifo_len;
}
dws->master = master;
dws->type = SSI_MOTO_SPI;
- dws->dma_inited = 0;
dws->dma_addr = (dma_addr_t)(dws->paddr + DW_SPI_DR);
spin_lock_init(&dws->buf_lock);
ret = dws->dma_ops->dma_init(dev, dws);
if (ret) {
dev_warn(dev, "DMA init failed\n");
- dws->dma_inited = 0;
} else {
master->can_dma = dws->dma_ops->can_dma;
}