Re: [PATCH 3/4] spi: spi-qcom-qspi: Call dma_wmb() after setting up descriptors

[Doug Anderson]

Hi,

On Tue, Jul 25, 2023 at 4:48 AM Vijaya Krishna Nivarthi
<quic_vnivarth@xxxxxxxxxxx> wrote:
>
> After setting up dma descriptors and before initiaiting dma transfer, call
> dma_wmb() to ensure all writes go through.
> This doesn't fix any reported problem but is added for safety.
>
> Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@xxxxxxxxxxx>
> ---
>  drivers/spi/spi-qcom-qspi.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

This looks right to me.

Fixes: b5762d95607e ("spi: spi-qcom-qspi: Add DMA mode support")
Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>