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spi/s3c64xx: Take runtime PM reference even if DMA is not supported

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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 <broonie@linaro.org>
This commit is contained in:
Mark Brown 2013-08-13 19:03:01 +01:00
parent 3c729b4344
commit c12f964357
1 changed files with 18 additions and 19 deletions
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37
drivers/spi/spi-s3c64xx.c
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@ -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;
if (!is_polling(sdd)) {
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
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;
}
/* 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);