Re: [PATCH] spi/acpi: fix incorrect ACPI parent check

[Mika Westerberg <mika.westerberg@linux.intel.com>]

On Thu, Jun 20, 2019 at 12:33:41PM +0200, Ard Biesheuvel wrote:
> Jarkko, does this help?
> 
> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> index 50d230b33c42..d072efdd65ba 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -1914,6 +1914,7 @@ static acpi_status
> acpi_register_spi_device(struct spi_controller *ctlr,
>                 return AE_OK;
> 
>         lookup.ctlr             = ctlr;
> +       lookup.max_speed_hz     = 0;
>         lookup.mode             = 0;
>         lookup.bits_per_word    = 0;
>         lookup.irq              = -1;

IMHO it's better to do:

	memset(&lookup, 0, sizeof(lookup));
	lookup.ctlr = ctlr;
	lookup.irq = -1;

this also initializes chip_select and possibly other fields that get
added to the lookup structure later.