diff options
| -rw-r--r-- | drivers/spi/spi-stm32.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 51d7f720127b..8310f14fe273 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -427,9 +427,9 @@ static void stm32_spi_disable(struct stm32_spi *spi) if (!spi->cur_usedma && spi->rx_buf && (spi->rx_len > 0)) stm32_spi_read_rxfifo(spi, true); - if (spi->cur_usedma && spi->tx_buf) + if (spi->cur_usedma && spi->dma_tx) dmaengine_terminate_all(spi->dma_tx); - if (spi->cur_usedma && spi->rx_buf) + if (spi->cur_usedma && spi->dma_rx) dmaengine_terminate_all(spi->dma_rx); stm32_spi_clr_bits(spi, STM32_SPI_CR1, SPI_CR1_SPE); @@ -750,7 +750,7 @@ static int stm32_spi_transfer_one_dma(struct stm32_spi *spi, spin_lock_irqsave(&spi->lock, flags); rx_dma_desc = NULL; - if (spi->rx_buf) { + if (spi->rx_buf && spi->dma_rx) { stm32_spi_dma_config(spi, &rx_dma_conf, DMA_DEV_TO_MEM); dmaengine_slave_config(spi->dma_rx, &rx_dma_conf); @@ -765,7 +765,7 @@ static int stm32_spi_transfer_one_dma(struct stm32_spi *spi, } tx_dma_desc = NULL; - if (spi->tx_buf) { + if (spi->tx_buf && spi->dma_tx) { stm32_spi_dma_config(spi, &tx_dma_conf, DMA_MEM_TO_DEV); dmaengine_slave_config(spi->dma_tx, &tx_dma_conf); @@ -776,8 +776,11 @@ static int stm32_spi_transfer_one_dma(struct stm32_spi *spi, DMA_PREP_INTERRUPT); } - if ((spi->tx_buf && !tx_dma_desc) || - (spi->rx_buf && !rx_dma_desc)) + if ((spi->tx_buf && spi->dma_tx && !tx_dma_desc) || + (spi->rx_buf && spi->dma_rx && !rx_dma_desc)) + goto dma_desc_error; + + if (spi->cur_comm == SPI_FULL_DUPLEX && (!tx_dma_desc || !rx_dma_desc)) goto dma_desc_error; if (rx_dma_desc) { @@ -822,7 +825,7 @@ static int stm32_spi_transfer_one_dma(struct stm32_spi *spi, return 1; dma_submit_error: - if (spi->rx_buf) + if (spi->dma_rx) dmaengine_terminate_all(spi->dma_rx); dma_desc_error: @@ -832,6 +835,7 @@ dma_desc_error: dev_info(spi->dev, "DMA issue: fall back to irq transfer\n"); + spi->cur_usedma = false; return stm32_spi_transfer_one_irq(spi); } @@ -984,7 +988,7 @@ static int stm32_spi_transfer_one(struct spi_master *master, spi->rx_len = spi->rx_buf ? transfer->len : 0; spi->cur_usedma = (master->can_dma && - stm32_spi_can_dma(master, spi_dev, transfer)); + master->can_dma(master, spi_dev, transfer)); ret = stm32_spi_transfer_one_setup(spi, spi_dev, transfer); if (ret) { |