linux-kernel - Re: [PATCH 01/02] ACPI: sysfs eject support for ACPI scan handlers

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Date:	Fri, 8 Feb 2013 09:50:28 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	Toshi Kani <toshi.kani@...com>
CC:	<rjw@...k.pl>, <linux-acpi@...r.kernel.org>,
	<gregkh@...uxfoundation.org>, <bhelgaas@...gle.com>,
	<mika.westerberg@...ux.intel.com>, <matthew.garrett@...ula.com>,
	<yinghai@...nel.org>, <liuj97@...il.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/02] ACPI: sysfs eject support for ACPI scan handlers

Hi Toshi,

2013/02/07 7:50, Toshi Kani wrote:
> Changed sysfs eject, acpi_eject_store(), to support ACPI scan handlers.
> 
> Signed-off-by: Toshi Kani <toshi.kani@...com>
> ---
>   drivers/acpi/scan.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index cfd7a69..3ff632e 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -203,7 +203,7 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
>   		return -EINVAL;
>   	}
>   #ifndef FORCE_EJECT

> -	if (acpi_device->driver == NULL) {
> +	if (!acpi_device->driver && !acpi_device->handler) {

I don't understand the fix.

The if sentence becomes true, when both acpi_device->driver and acpi_device->handler
are NULL. It means that acpi_eject_store() runs if either acpi_device->driver or
acpi_device->handler has pointer. Is it O.K.?

I think it should be if (!acpi_device->driver || !acpi_device->handler).

Thanks,
Yasuaki Ishimatsu

>   		ret = -ENODEV;
>   		goto err;
>   	}
> --
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> 


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