linux-kernel - Re: [RFC PATCH v2, part 2 12/18] PCI, ACPI: use hotplug-safe iterators to walk PCI buses

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Date:	Tue, 14 May 2013 22:28:11 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jiang Liu <liuj97@...il.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Jiang Liu <jiang.liu@...wei.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Gu Zheng <guz.fnst@...fujitsu.com>,
	Toshi Kani <toshi.kani@...com>,
	Myron Stowe <myron.stowe@...hat.com>,
	Yijing Wang <wangyijing@...wei.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, Len Brown <lenb@...nel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: [RFC PATCH v2, part 2 12/18] PCI, ACPI: use hotplug-safe iterators to walk PCI buses

On Wednesday, May 15, 2013 12:51:56 AM Jiang Liu wrote:
> Enhance ACPI reset drvier to use hotplug-safe iterators to walk PCI buses.
> 
> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
> Cc: Len Brown <lenb@...nel.org>
> Cc: "Rafael J. Wysocki" <rjw@...k.pl>
> Cc: linux-acpi@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

> ---
>  drivers/acpi/reboot.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c
> index a6c77e8b..532dd6d 100644
> --- a/drivers/acpi/reboot.c
> +++ b/drivers/acpi/reboot.c
> @@ -33,7 +33,7 @@ void acpi_reboot(void)
>  	switch (rr->space_id) {
>  	case ACPI_ADR_SPACE_PCI_CONFIG:
>  		/* The reset register can only live on bus 0. */
> -		bus0 = pci_find_bus(0, 0);
> +		bus0 = pci_get_bus(0, 0);
>  		if (!bus0)
>  			return;
>  		/* Form PCI device/function pair. */
> @@ -43,6 +43,7 @@ void acpi_reboot(void)
>  		/* Write the value that resets us. */
>  		pci_bus_write_config_byte(bus0, devfn,
>  				(rr->address & 0xffff), reset_value);
> +		pci_bus_put(bus0);
>  		break;
>  
>  	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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