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

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Message-ID: <1360286710.3869.53.camel@misato.fc.hp.com>
Date:	Thu, 07 Feb 2013 18:25:10 -0700
From:	Toshi Kani <toshi.kani@...com>
To:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.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

On Fri, 2013-02-08 at 10:33 +0900, Yasuaki Ishimatsu wrote:
> 2013/02/08 10:10, Toshi Kani wrote:
> > On Fri, 2013-02-08 at 09:50 +0900, Yasuaki Ishimatsu wrote:
> >> 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.?
> >
> > Yes.
> >
> >> I think it should be if (!acpi_device->driver || !acpi_device->handler).
> >
> > No, the condition has to be "&&" because an acpi_device is _either_
> > bound to an ACPI driver or an ACPI scan handler.
> 
> Thank you for you clarification. I understood it.
> 
> Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>

Thanks Yasuaki!
-Toshi


> 
> Thanks,
> Yasuaki Ishimatsu
> 
> >
> > Thanks,
> > -Toshi
> >
> >
> 
> 


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