linux-kernel - Re: [BUGFIX 3/9] ACPI, DOCK: clean up unused module related code

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Date:	Fri, 14 Jun 2013 16:16:04 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jiang Liu <liuj97@...il.com>
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Yinghai Lu <yinghai@...nel.org>,
	"Alexander E . Patrakov" <patrakov@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Yijing Wang <wangyijing@...wei.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, Shaohua Li <shaohua.li@...el.com>,
	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org
Subject: Re: [BUGFIX 3/9] ACPI, DOCK: clean up unused module related code

On Friday, June 14, 2013 10:04:01 PM Jiang Liu wrote:
> On 06/14/2013 02:26 AM, Rafael J. Wysocki wrote:
> > On Friday, June 14, 2013 12:32:26 AM Jiang Liu wrote:
> >> ACPI dock driver can't be built as a module any more, so clean up
> >> module related code.
> >>
> >> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
> >> Cc: Shaohua Li <shaohua.li@...el.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
> > 
> > How exactly does this depend on [2/9]?  If it doesn't at all, it should go
> > after [1/9].
> > 
> >> ---
> >>  drivers/acpi/dock.c | 41 -----------------------------------------
> >>  1 file changed, 41 deletions(-)
> >>
> >> diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
> >> index 79c8d9e..50e38b7 100644
> >> --- a/drivers/acpi/dock.c
> >> +++ b/drivers/acpi/dock.c
> >> @@ -53,12 +53,6 @@ MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
> >>  
> >>  static struct atomic_notifier_head dock_notifier_list;
> >>  
> >> -static const struct acpi_device_id dock_device_ids[] = {
> >> -	{"LNXDOCK", 0},
> >> -	{"", 0},
> >> -};
> >> -MODULE_DEVICE_TABLE(acpi, dock_device_ids);
> >> -
> > 
> > Don't we actually need the device IDs?
> Now dock driver could only be built as built-in, and it doesn't really
> bind to ACPI dock devices, so I think the device ids are not used any
> more. Not sure whether any userspace tool has dependency on the device
> IDs.

I see.  OK

Thanks,
Rafael


> > 
> >>  struct dock_station {
> >>  	acpi_handle handle;
> >>  	unsigned long last_dock_time;
> >> @@ -1013,30 +1007,6 @@ err_unregister:
> >>  }
> >>  
> >>  /**
> >> - * dock_remove - free up resources related to the dock station
> >> - */
> >> -static int dock_remove(struct dock_station *ds)
> >> -{
> >> -	struct dock_dependent_device *dd, *tmp;
> >> -	struct platform_device *dock_device = ds->dock_device;
> >> -
> >> -	if (!dock_station_count)
> >> -		return 0;
> >> -
> >> -	/* remove dependent devices */
> >> -	list_for_each_entry_safe(dd, tmp, &ds->dependent_devices, list)
> >> -		kfree(dd);
> >> -
> >> -	list_del(&ds->sibling);
> >> -
> >> -	/* cleanup sysfs */
> >> -	sysfs_remove_group(&dock_device->dev.kobj, &dock_attribute_group);
> >> -	platform_device_unregister(dock_device);
> >> -
> >> -	return 0;
> >> -}
> >> -
> >> -/**
> >>   * find_dock_and_bay - look for dock stations and bays
> >>   * @handle: acpi handle of a device
> >>   * @lvl: unused
> >> @@ -1073,14 +1043,3 @@ int __init acpi_dock_init(void)
> >>  		ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count);
> >>  	return 0;
> >>  }
> >> -
> >> -static void __exit dock_exit(void)
> >> -{
> >> -	struct dock_station *tmp, *dock_station;
> >> -
> >> -	unregister_acpi_bus_notifier(&dock_acpi_notifier);
> >> -	list_for_each_entry_safe(dock_station, tmp, &dock_stations, sibling)
> >> -		dock_remove(dock_station);
> >> -}
> >> -
> >> -module_exit(dock_exit);
> > 
> > The other changes look OK to me.
> Thanks for review.
> 
> > 
> > Thanks,
> > Rafael
> > 
> > 
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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