Re: [PATCH 1/3] staging: vme: change static device array to pointers

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On 01/09/11 10:15, Manohar Vanga wrote:
> Change the static array of 'struct device''s in struct vme_bridge
> to instead use an array of pointers. This is in accordance with the
> requirement that all kobjects be dynamically allocated (see
> Documentation/kobject.txt) and never be statically allocated.
> 
> Signed-off-by: Manohar Vanga <manohar.vanga@xxxxxxx>

Acked-by: Martyn Welch <martyn.welch@xxxxxx>

> ---
>  drivers/staging/vme/vme.c        |   21 +++++++++++++++++----
>  drivers/staging/vme/vme_bridge.h |    2 +-
>  2 files changed, 18 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/staging/vme/vme.c b/drivers/staging/vme/vme.c
> index feb2d00..810fe1f 100644
> --- a/drivers/staging/vme/vme.c
> +++ b/drivers/staging/vme/vme.c
> @@ -1338,6 +1338,11 @@ static void vme_remove_bus(struct vme_bridge *bridge)
>  	mutex_unlock(&vme_buses_lock);
>  }
>  
> +static void vme_dev_release(struct device *dev)
> +{
> +	kfree(dev);
> +}
> +
>  int vme_register_bridge(struct vme_bridge *bridge)
>  {
>  	struct device *dev;
> @@ -1353,11 +1358,17 @@ int vme_register_bridge(struct vme_bridge *bridge)
>  	 * specification.
>  	 */
>  	for (i = 0; i < VME_SLOTS_MAX; i++) {
> -		dev = &bridge->dev[i];
> +		bridge->dev[i] = kzalloc(sizeof(struct device), GFP_KERNEL);
> +		if (!bridge->dev[i]) {
> +			retval = -ENOMEM;
> +			goto err_devalloc;
> +		}
> +		dev = bridge->dev[i];
>  		memset(dev, 0, sizeof(struct device));
>  
>  		dev->parent = bridge->parent;
>  		dev->bus = &vme_bus_type;
> +		dev->release = vme_dev_release;
>  		/*
>  		 * We save a pointer to the bridge in platform_data so that we
>  		 * can get to it later. We keep driver_data for use by the
> @@ -1374,8 +1385,10 @@ int vme_register_bridge(struct vme_bridge *bridge)
>  	return retval;
>  
>  err_reg:
> +	kfree(dev);
> +err_devalloc:
>  	while (--i >= 0) {
> -		dev = &bridge->dev[i];
> +		dev = bridge->dev[i];
>  		device_unregister(dev);
>  	}
>  	vme_remove_bus(bridge);
> @@ -1390,7 +1403,7 @@ void vme_unregister_bridge(struct vme_bridge *bridge)
>  
>  
>  	for (i = 0; i < VME_SLOTS_MAX; i++) {
> -		dev = &bridge->dev[i];
> +		dev = bridge->dev[i];
>  		device_unregister(dev);
>  	}
>  	vme_remove_bus(bridge);
> @@ -1427,7 +1440,7 @@ static int vme_calc_slot(struct device *dev)
>  	/* Determine slot number */
>  	num = 0;
>  	while (num < VME_SLOTS_MAX) {
> -		if (&bridge->dev[num] == dev)
> +		if (bridge->dev[num] == dev)
>  			break;
>  
>  		num++;
> diff --git a/drivers/staging/vme/vme_bridge.h b/drivers/staging/vme/vme_bridge.h
> index 8959670..4b8566e 100644
> --- a/drivers/staging/vme/vme_bridge.h
> +++ b/drivers/staging/vme/vme_bridge.h
> @@ -114,7 +114,7 @@ struct vme_bridge {
>  	void *driver_priv;	/* Private pointer for the bridge driver */
>  	struct list_head bus_list; /* list of VME buses */
>  
> -	struct device dev[VME_SLOTS_MAX];	/* Device registered with
> +	struct device *dev[VME_SLOTS_MAX];	/* Device registered with
>  						 * device model on VME bus
>  						 */
>  


-- 
Martyn Welch (Principal Software Engineer) | Registered in England and
GE Intelligent Platforms                   | Wales (3828642) at 100
T +44(0)1327322748                         | Barbirolli Square, Manchester,
E martyn.welch@xxxxxx                      | M2 3AB  VAT:GB 927559189
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