diff options
| author | Shawn Lin <shawn.lin@rock-chips.com> | 2016-03-31 11:11:41 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-03-31 12:06:19 -0700 |
| commit | e4c0e06f949b9493cafe952c3029576b47c2a7c4 (patch) | |
| tree | b30d4fb514c2cd64f98edda74925d83feb65fda2 /drivers/spi | |
| parent | bb51537aa825e98b970c784f802e7e09f29df3ba (diff) | |
| download | linux-e4c0e06f949b9493cafe952c3029576b47c2a7c4.tar.bz2 | |
spi: rockchip: fix probe deferral handling
Use dma_request_chan instead of dma_request_slave_channel,
in this case we can check EPROBE_DEFER without static
warning.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-rockchip.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index bfeb0d4c7ee0..9713b811a2cd 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -723,23 +723,27 @@ static int rockchip_spi_probe(struct platform_device *pdev) master->transfer_one = rockchip_spi_transfer_one; master->handle_err = rockchip_spi_handle_err; - rs->dma_tx.ch = dma_request_slave_channel(rs->dev, "tx"); - if (IS_ERR_OR_NULL(rs->dma_tx.ch)) { + rs->dma_tx.ch = dma_request_chan(rs->dev, "tx"); + if (IS_ERR(rs->dma_tx.ch)) { /* Check tx to see if we need defer probing driver */ if (PTR_ERR(rs->dma_tx.ch) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; goto err_get_fifo_len; } dev_warn(rs->dev, "Failed to request TX DMA channel\n"); + rs->dma_tx.ch = NULL; } - rs->dma_rx.ch = dma_request_slave_channel(rs->dev, "rx"); - if (!rs->dma_rx.ch) { - if (rs->dma_tx.ch) { + 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; } dev_warn(rs->dev, "Failed to request RX DMA channel\n"); + rs->dma_rx.ch = NULL; } if (rs->dma_tx.ch && rs->dma_rx.ch) { |