From 22ee9de1ecfb4459a9b3a959994f6ccb4a3827a4 Mon Sep 17 00:00:00 2001 From: Michael Walle Date: Tue, 10 Mar 2020 08:33:13 +0100 Subject: spi: spi-fsl-dspi: fix DMA mapping Use the correct device to request the DMA mapping. Otherwise the IOMMU doesn't get the mapping and it will generate a page fault. The error messages look like: [ 3.008452] arm-smmu 5000000.iommu: Unhandled context fault: fsr=0x402, iova=0xf9800000, fsynr=0x3f0022, cbfrsynra=0x828, cb=8 [ 3.020123] arm-smmu 5000000.iommu: Unhandled context fault: fsr=0x402, iova=0xf9800000, fsynr=0x3f0022, cbfrsynra=0x828, cb=8 This was tested on a custom board with a LS1028A SoC. Signed-off-by: Michael Walle Link: https://lore.kernel.org/r/20200310073313.21277-1-michael@walle.cc Signed-off-by: Mark Brown --- drivers/spi/spi-fsl-dspi.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index 0683a3fbd48c..50e3382f0c50 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -497,14 +497,16 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr) goto err_tx_channel; } - dma->tx_dma_buf = dma_alloc_coherent(dev, dspi->devtype_data->dma_bufsize, + dma->tx_dma_buf = dma_alloc_coherent(dma->chan_tx->device->dev, + dspi->devtype_data->dma_bufsize, &dma->tx_dma_phys, GFP_KERNEL); if (!dma->tx_dma_buf) { ret = -ENOMEM; goto err_tx_dma_buf; } - dma->rx_dma_buf = dma_alloc_coherent(dev, dspi->devtype_data->dma_bufsize, + dma->rx_dma_buf = dma_alloc_coherent(dma->chan_rx->device->dev, + dspi->devtype_data->dma_bufsize, &dma->rx_dma_phys, GFP_KERNEL); if (!dma->rx_dma_buf) { ret = -ENOMEM; @@ -541,10 +543,12 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr) return 0; err_slave_config: - dma_free_coherent(dev, dspi->devtype_data->dma_bufsize, + dma_free_coherent(dma->chan_rx->device->dev, + dspi->devtype_data->dma_bufsize, dma->rx_dma_buf, dma->rx_dma_phys); err_rx_dma_buf: - dma_free_coherent(dev, dspi->devtype_data->dma_bufsize, + dma_free_coherent(dma->chan_tx->device->dev, + dspi->devtype_data->dma_bufsize, dma->tx_dma_buf, dma->tx_dma_phys); err_tx_dma_buf: dma_release_channel(dma->chan_tx); @@ -560,20 +564,19 @@ err_tx_channel: static void dspi_release_dma(struct fsl_dspi *dspi) { struct fsl_dspi_dma *dma = dspi->dma; - struct device *dev = &dspi->pdev->dev; if (!dma) return; if (dma->chan_tx) { - dma_unmap_single(dev, dma->tx_dma_phys, + dma_unmap_single(dma->chan_tx->device->dev, dma->tx_dma_phys, dspi->devtype_data->dma_bufsize, DMA_TO_DEVICE); dma_release_channel(dma->chan_tx); } if (dma->chan_rx) { - dma_unmap_single(dev, dma->rx_dma_phys, + dma_unmap_single(dma->chan_rx->device->dev, dma->rx_dma_phys, dspi->devtype_data->dma_bufsize, DMA_FROM_DEVICE); dma_release_channel(dma->chan_rx); -- cgit v1.2.3