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spi: Fixes for v4.5 

A few driver specific fixes for the Rockchip and i.MX SPI controllers,
 especially for the i.MX they're annoying bugs if you run into them.
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Merge tag 'spi-fix-v4.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A few driver specific fixes for the Rockchip and i.MX SPI controllers,
  especially for the i.MX they're annoying bugs if you run into them"

* tag 'spi-fix-v4.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: imx: fix spi resource leak with dma transfer
  spi: imx: allow only WML aligned transfers to use DMA
  spi: rockchip: add missing spi_master_put
  spi: rockchip: disable runtime pm when in err case
This commit is contained in:
Linus Torvalds 2016-03-09 20:24:23 -08:00
parent 718e47a573 3ee20abb06
commit 8e0f93cda4
2 changed files with 5 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/spi/spi-imx.c
View File

@ -204,8 +204,8 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
{
struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
if (spi_imx->dma_is_inited &&
transfer->len > spi_imx->wml * sizeof(u32))
if (spi_imx->dma_is_inited && transfer->len >= spi_imx->wml &&
(transfer->len % spi_imx->wml) == 0)
return true;
return false;
}
@ -919,8 +919,6 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx,
struct dma_async_tx_descriptor *desc_tx = NULL, *desc_rx = NULL;
int ret;
unsigned long timeout;
u32 dma;
int left;
struct spi_master *master = spi_imx->bitbang.master;
struct sg_table *tx = &transfer->tx_sg, *rx = &transfer->rx_sg;
@ -954,13 +952,6 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx,
/* Trigger the cspi module. */
spi_imx->dma_finished = 0;
dma = readl(spi_imx->base + MX51_ECSPI_DMA);
dma = dma & (~MX51_ECSPI_DMA_RXT_WML_MASK);
/* Change RX_DMA_LENGTH trigger dma fetch tail data */
left = transfer->len % spi_imx->wml;
if (left)
writel(dma | (left << MX51_ECSPI_DMA_RXT_WML_OFFSET),
spi_imx->base + MX51_ECSPI_DMA);
/*
* Set these order to avoid potential RX overflow. The overflow may
* happen if we enable SPI HW before starting RX DMA due to rescheduling
@ -992,10 +983,6 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx,
spi_imx->devtype_data->reset(spi_imx);
dmaengine_terminate_all(master->dma_rx);
}
dma &= ~MX51_ECSPI_DMA_RXT_WML_MASK;
writel(dma |
spi_imx->wml << MX51_ECSPI_DMA_RXT_WML_OFFSET,
spi_imx->base + MX51_ECSPI_DMA);
}
spi_imx->dma_finished = 1;

3
drivers/spi/spi-rockchip.c
View File

@ -749,6 +749,7 @@ static int rockchip_spi_probe(struct platform_device *pdev)
return 0;
err_register_master:
pm_runtime_disable(&pdev->dev);
if (rs->dma_tx.ch)
dma_release_channel(rs->dma_tx.ch);
if (rs->dma_rx.ch)
@ -778,6 +779,8 @@ static int rockchip_spi_remove(struct platform_device *pdev)
if (rs->dma_rx.ch)
dma_release_channel(rs->dma_rx.ch);
spi_master_put(master);
return 0;
}