From c12f964357fc6de54252a4134720083d687caa22 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 13 Aug 2013 19:03:01 +0100 Subject: [PATCH] spi/s3c64xx: Take runtime PM reference even if DMA is not supported We always need the device to be runtime PM enabled to use it so just skip the DMA initialisation not the entire prepare when polling. Signed-off-by: Mark Brown --- drivers/spi/spi-s3c64xx.c | 39 +++++++++++++++++++-------------------- 1 file changed, 19 insertions(+), 20 deletions(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index a7a739c89488..eee1a7b4adc4 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -429,27 +429,26 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi) dma_cap_mask_t mask; int ret; - if (is_polling(sdd)) - return 0; - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - /* Acquire DMA channels */ - sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter, - (void *)sdd->rx_dma.dmach, dev, "rx"); - if (!sdd->rx_dma.ch) { - dev_err(dev, "Failed to get RX DMA channel\n"); - ret = -EBUSY; - goto out; - } + if (!is_polling(sdd)) { + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + + /* Acquire DMA channels */ + sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter, + (void *)sdd->rx_dma.dmach, dev, "rx"); + if (!sdd->rx_dma.ch) { + dev_err(dev, "Failed to get RX DMA channel\n"); + ret = -EBUSY; + goto out; + } - sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter, - (void *)sdd->tx_dma.dmach, dev, "tx"); - if (!sdd->tx_dma.ch) { - dev_err(dev, "Failed to get TX DMA channel\n"); - ret = -EBUSY; - goto out_rx; + sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter, + (void *)sdd->tx_dma.dmach, dev, "tx"); + if (!sdd->tx_dma.ch) { + dev_err(dev, "Failed to get TX DMA channel\n"); + ret = -EBUSY; + goto out_rx; + } } ret = pm_runtime_get_sync(&sdd->pdev->dev); -- 2.39.5