From b3f82dc26c0d4e1348ef81e0189cb8838b8b0d22 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 29 May 2020 21:31:49 +0300 Subject: [PATCH] spi: dw: Make DMA request line assignments explicit for Intel Medfield The 2afccbd283ae ("spi: dw: Discard static DW DMA slave structures") did a clean up of global variables, which is fine, but messed up with the carefully provided information in the custom DMA slave structures. There reader can find an assignment of the DMA request lines in use. Partially revert the above mentioned commit to restore readability and maintainability of the code. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20200529183150.44149-1-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- drivers/spi/spi-dw-dma.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c index 1b96cec..53d5257 100644 --- a/drivers/spi/spi-dw-dma.c +++ b/drivers/spi/spi-dw-dma.c @@ -61,10 +61,8 @@ static void dw_spi_dma_maxburst_init(struct dw_spi *dws) static int dw_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws) { - struct dw_dma_slave slave = { - .src_id = 0, - .dst_id = 0 - }; + struct dw_dma_slave dma_tx = { .dst_id = 1 }, *tx = &dma_tx; + struct dw_dma_slave dma_rx = { .src_id = 0 }, *rx = &dma_rx; struct pci_dev *dma_dev; dma_cap_mask_t mask; @@ -80,14 +78,14 @@ static int dw_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws) dma_cap_set(DMA_SLAVE, mask); /* 1. Init rx channel */ - slave.dma_dev = &dma_dev->dev; - dws->rxchan = dma_request_channel(mask, dw_spi_dma_chan_filter, &slave); + rx->dma_dev = &dma_dev->dev; + dws->rxchan = dma_request_channel(mask, dw_spi_dma_chan_filter, rx); if (!dws->rxchan) goto err_exit; /* 2. Init tx channel */ - slave.dst_id = 1; - dws->txchan = dma_request_channel(mask, dw_spi_dma_chan_filter, &slave); + tx->dma_dev = &dma_dev->dev; + dws->txchan = dma_request_channel(mask, dw_spi_dma_chan_filter, tx); if (!dws->txchan) goto free_rxchan; -- 2.7.4