linux-kernel - Re: [PATCH v5 08/14] ACPI: ARM64: IORT: rework iort_node_get

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Date:   Fri, 30 Dec 2016 17:00:34 +0800
From:   Xinwei Kong <kong.kongxinwei@...ilicon.com>
To:     Hanjun Guo <guohanjun@...wei.com>,
        Marc Zyngier <marc.zyngier@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
CC:     Charles Garcia-Tobin <charles.garcia-tobin@....com>,
        <jcm@...hat.com>, <yimin@...wei.com>,
        Tomasz Nowicki <tn@...ihalf.com>,
        <linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>,
        Sinan Kaya <okaya@...eaurora.org>,
        <linux-acpi@...r.kernel.org>, Hanjun Guo <hanjun.guo@...aro.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        "Thomas Gleixner" <tglx@...utronix.de>,
        Agustin Vega-Frias <agustinv@...eaurora.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 08/14] ACPI: ARM64: IORT: rework iort_node_get_id()

On 2016/12/22 13:35, Hanjun Guo wrote:
> From: Hanjun Guo <hanjun.guo@...aro.org>
>
> iort_node_get_id() has two output, one is the mapped ids,
> the other is the referenced parent node which is returned
> from the function.
>
> For now we need a API just return its parent node for
> single mapping, so just update this function slightly then
> reuse it later.
>
> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> Cc: Marc Zyngier <marc.zyngier@....com>
> ---
>   drivers/acpi/arm64/iort.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
> index ab7bae7..bc68d93 100644
> --- a/drivers/acpi/arm64/iort.c
> +++ b/drivers/acpi/arm64/iort.c
> @@ -347,7 +347,8 @@ struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
>   	if (map[index].flags & ACPI_IORT_ID_SINGLE_MAPPING) {
>   		if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT ||
>   		    node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
> -			*id_out = map[index].output_base;
> +			if (id_out)
> +				*id_out = map[index].output_base;
>   			return parent;
>   		}
>   	}
Tested-by:  Xinwei Kong <kong.kongxinwei@...ilicon.com>