[PATCH] spi: Mediatek: fix endian warnings
Arnd Bergmann
arnd at arndb.de
Sat Aug 15 13:17:15 PDT 2015
On Saturday 15 August 2015 22:16:03 Arnd Bergmann wrote:
> On Tuesday 11 August 2015 18:43:09 Leilk Liu wrote:
> > @@ -359,9 +359,11 @@ static void mtk_spi_setup_dma_addr(struct spi_master *master,
> > struct mtk_spi *mdata = spi_master_get_devdata(master);
> >
> > if (mdata->tx_sgl)
> > - writel(cpu_to_le32(xfer->tx_dma), mdata->base + SPI_TX_SRC_REG);
> > + writel((__force u32)cpu_to_le32(xfer->tx_dma),
> > + mdata->base + SPI_TX_SRC_REG);
> > if (mdata->rx_sgl)
> > - writel(cpu_to_le32(xfer->rx_dma), mdata->base + SPI_RX_DST_REG);
> > + writel((__force u32)cpu_to_le32(xfer->rx_dma),
> > + mdata->base + SPI_RX_DST_REG);
> > }
> >
>
> This looks wrong: writel takes a CPU-endian argument, so the value returned
> from cpu_to_le32() is not appropriate.
>
> The warning is correct, and you have to remove the cpu_to_le32() conversion
> in order to get the driver to behave correctly when the kernel is built
> as big-endian.
Nevermind, I now saw the issue has already been raised.
Arnd
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