Hi Marek,
On Tue, Oct 9, 2018 at 8:26 PM Marek Vasut <marek.va...@gmail.com> wrote:
>
> Pass the entire source data pointer to tmio_sd_addr_is_dmaable()
This statement sounds like
the current code is passing the pointer address only partially.
Is it right?
> so we don't have to apply casts throughout the code.
I do not understand this either
since I see a cast in your code too.
In the previous code, the caller casts src->address
when it passes it to tmio_sd_addr_is_dmaable().
In the new code, 'src' is casted
in tmio_sd_addr_is_dmaable().
To me, you just moved the location of casting.
What is the difference (i.e. benefit)?
If you want to change this code, I am fine.
But, I'd like to know the reason.
At least, I am so confused with your commit description.
> Signed-off-by: Marek Vasut <marek.vasut+rene...@gmail.com>
> Cc: Masahiro Yamada <yamada.masah...@socionext.com>
> ---
> drivers/mmc/tmio-common.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c
> index b311b80be8..6b21941991 100644
> --- a/drivers/mmc/tmio-common.c
> +++ b/drivers/mmc/tmio-common.c
> @@ -372,8 +372,10 @@ static int tmio_sd_dma_xfer(struct udevice *dev, struct
> mmc_data *data)
> }
>
> /* check if the address is DMA'able */
> -static bool tmio_sd_addr_is_dmaable(unsigned long addr)
> +static bool tmio_sd_addr_is_dmaable(const char *src)
> {
> + uintptr_t addr = (uintptr_t)src;
> +
> if (!IS_ALIGNED(addr, TMIO_SD_DMA_MINALIGN))
> return false;
>
> @@ -486,7 +488,7 @@ int tmio_sd_send_cmd(struct udevice *dev, struct mmc_cmd
> *cmd,
> if (data) {
> /* use DMA if the HW supports it and the buffer is aligned */
> if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL &&
> - tmio_sd_addr_is_dmaable((long)data->src))
> + tmio_sd_addr_is_dmaable(data->src))
> ret = tmio_sd_dma_xfer(dev, data);
> else
> ret = tmio_sd_pio_xfer(dev, data);
> --
> 2.18.0
>
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--
Best Regards
Masahiro Yamada
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