Re: [PATCH 2/2] spi: xilinx: Return IRQ_NONE if no interrupts were detected

[Ricardo Ribalda Delgado <ricardo.ribalda-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Acked-by: Ricardo Ribalda Delgado <ricardo.ribalda-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

On Tue, Jul 12, 2016 at 3:24 PM, Lars-Peter Clausen <lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org> wrote:
> Return IRQ_NONE from the interrupt handler if the handler is running, but
> no interrupt was detected. This allows the system to recover in case of an
> interrupt storm due to an invalid interrupt configuration or faulty
> hardware.
>
> Signed-off-by: Lars-Peter Clausen <lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>
> ---
>  drivers/spi/spi-xilinx.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
> index 334f423..f8280f3 100644
> --- a/drivers/spi/spi-xilinx.c
> +++ b/drivers/spi/spi-xilinx.c
> @@ -341,9 +341,10 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
>
>         if (ipif_isr & XSPI_INTR_TX_EMPTY) {    /* Transmission completed */
>                 complete(&xspi->done);
> +               return IRQ_HANDLED;
>         }
>
> -       return IRQ_HANDLED;
> +       return IRQ_NONE;
>  }
>
>  static int xilinx_spi_find_buffer_size(struct xilinx_spi *xspi)
> --
> 2.1.4
>



-- 
Ricardo Ribalda
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