diff options
Diffstat (limited to 'drivers/spi/spi-rockchip.c')
| -rw-r--r-- | drivers/spi/spi-rockchip.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 6c6c0013e..1026e180e 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -578,7 +578,7 @@ static int rockchip_spi_transfer_one( struct spi_device *spi, struct spi_transfer *xfer) { - int ret = 1; + int ret = 0; struct rockchip_spi *rs = spi_master_get_devdata(master); WARN_ON(readl_relaxed(rs->regs + ROCKCHIP_SPI_SSIENR) && @@ -627,6 +627,8 @@ static int rockchip_spi_transfer_one( spi_enable_chip(rs, 1); ret = rockchip_spi_prepare_dma(rs); } + /* successful DMA prepare means the transfer is in progress */ + ret = ret ? ret : 1; } else { spi_enable_chip(rs, 1); ret = rockchip_spi_pio_transfer(rs); @@ -744,10 +746,8 @@ static int rockchip_spi_probe(struct platform_device *pdev) rs->dma_rx.ch = dma_request_chan(rs->dev, "rx"); if (IS_ERR(rs->dma_rx.ch)) { if (PTR_ERR(rs->dma_rx.ch) == -EPROBE_DEFER) { - dma_release_channel(rs->dma_tx.ch); - rs->dma_tx.ch = NULL; ret = -EPROBE_DEFER; - goto err_get_fifo_len; + goto err_free_dma_tx; } dev_warn(rs->dev, "Failed to request RX DMA channel\n"); rs->dma_rx.ch = NULL; @@ -775,10 +775,11 @@ static int rockchip_spi_probe(struct platform_device *pdev) err_register_master: pm_runtime_disable(&pdev->dev); - if (rs->dma_tx.ch) - dma_release_channel(rs->dma_tx.ch); if (rs->dma_rx.ch) dma_release_channel(rs->dma_rx.ch); +err_free_dma_tx: + if (rs->dma_tx.ch) + dma_release_channel(rs->dma_tx.ch); err_get_fifo_len: clk_disable_unprepare(rs->spiclk); err_spiclk_enable: |