Switch to use ma_request_slave_channel_compat_reason() to request the DMA channels. Only fall back to pio mode if the error code returned is not -EPROBE_DEFER, otherwise return from the probe with the -EPROBE_DEFER.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@ti.com CC: Mark Brown broonie@kernel.org --- drivers/spi/spi-omap2-mcspi.c | 36 +++++++++++++++++++++--------------- 1 file changed, 21 insertions(+), 15 deletions(-)
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index a7d85c5ab2fa..e6ff937688ff 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -948,6 +948,7 @@ static int omap2_mcspi_request_dma(struct spi_device *spi) struct omap2_mcspi_dma *mcspi_dma; dma_cap_mask_t mask; unsigned sig; + int ret = 0;
mcspi = spi_master_get_devdata(master); mcspi_dma = mcspi->dma_channels + spi->chip_select; @@ -959,30 +960,35 @@ static int omap2_mcspi_request_dma(struct spi_device *spi) dma_cap_set(DMA_SLAVE, mask); sig = mcspi_dma->dma_rx_sync_dev;
- mcspi_dma->dma_rx = - dma_request_slave_channel_compat(mask, omap_dma_filter_fn, - &sig, &master->dev, - mcspi_dma->dma_rx_ch_name); - if (!mcspi_dma->dma_rx) + mcspi_dma->dma_rx = dma_request_slave_channel_compat_reason(mask, + omap_dma_filter_fn, &sig, &master->dev, + mcspi_dma->dma_rx_ch_name); + if (IS_ERR(mcspi_dma->dma_rx)) { + ret = PTR_ERR(mcspi_dma->dma_rx); + mcspi_dma->dma_rx = NULL; + if (ret != -EPROBE_DEFER) + ret = -EAGAIN; goto no_dma; + }
sig = mcspi_dma->dma_tx_sync_dev; - mcspi_dma->dma_tx = - dma_request_slave_channel_compat(mask, omap_dma_filter_fn, - &sig, &master->dev, - mcspi_dma->dma_tx_ch_name); + mcspi_dma->dma_tx = dma_request_slave_channel_compat_reason(mask, + omap_dma_filter_fn, &sig, &master->dev, + mcspi_dma->dma_tx_ch_name);
- if (!mcspi_dma->dma_tx) { + if (IS_ERR(mcspi_dma->dma_tx)) { + ret = PTR_ERR(mcspi_dma->dma_tx); + mcspi_dma->dma_tx = NULL; dma_release_channel(mcspi_dma->dma_rx); mcspi_dma->dma_rx = NULL; - goto no_dma; + if (ret != -EPROBE_DEFER) + ret = -EAGAIN; }
- return 0; - no_dma: - dev_warn(&spi->dev, "not using DMA for McSPI\n"); - return -EAGAIN; + if (ret && ret != -EPROBE_DEFER) + dev_warn(&spi->dev, "not using DMA for McSPI\n"); + return ret; }
static int omap2_mcspi_setup(struct spi_device *spi)