linux-kernel - Re: [PATCH] firewire: remove driver_data direct access of struct device

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Message-ID: <4A08B9AD.3030208@s5r6.in-berlin.de>
Date:	Tue, 12 May 2009 01:50:05 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Roel Kluin <roel.kluin@...il.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
CC:	krh@...hat.com, linux1394-devel@...ts.sourceforge.net,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] firewire: remove driver_data direct access of struct
 device

Roel Kluin wrote:
> To avoid direct access to the driver_data pointer in struct device, the
> functions dev_get_drvdata() and dev_set_drvdata() should be used.
> 
> Signed-off-by: Roel Kluin <roel.kluin@...il.com>

Greg has this already in his driver core tree.

BTW Greg, just in case, the patches
"firewire: remove driver_data direct access of struct device" and
"ieee1394: remove driver_data direct access of struct device"
which you posted on April 30 are
Acked-by: Stefan Richter <stefanr@...6.in-berlin.de>

> ---
> diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
> index 2bcf515..a70e66e 100644
> --- a/drivers/firewire/fw-sbp2.c
> +++ b/drivers/firewire/fw-sbp2.c
> @@ -1125,7 +1125,7 @@ static int sbp2_probe(struct device *dev)
>  		return -ENOMEM;
>  
>  	tgt = (struct sbp2_target *)shost->hostdata;
> -	unit->device.driver_data = tgt;
> +	dev_set_drvdata(&unit->device, tgt);
>  	tgt->unit = unit;
>  	kref_init(&tgt->kref);
>  	INIT_LIST_HEAD(&tgt->lu_list);
> @@ -1180,7 +1180,7 @@ static int sbp2_probe(struct device *dev)
>  static int sbp2_remove(struct device *dev)
>  {
>  	struct fw_unit *unit = fw_unit(dev);
> -	struct sbp2_target *tgt = unit->device.driver_data;
> +	struct sbp2_target *tgt = dev_get_drvdata(&unit->device);
>  
>  	sbp2_target_put(tgt);
>  	return 0;
> @@ -1240,7 +1240,7 @@ static void sbp2_reconnect(struct work_struct *work)
>  
>  static void sbp2_update(struct fw_unit *unit)
>  {
> -	struct sbp2_target *tgt = unit->device.driver_data;
> +	struct sbp2_target *tgt = dev_get_drvdata(&unit->device);
>  	struct sbp2_logical_unit *lu;
>  
>  	fw_device_enable_phys_dma(fw_device(unit->device.parent));

-- 
Stefan Richter
-=====-=-=== -=-= -==-=
http://arcgraph.de/sr/
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