linux-kernel - Re: [PATCH 5/5] power: sbs-battery: Change power supply name

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Date:	Tue, 6 Dec 2011 05:33:06 +0400
From:	Anton Vorontsov <cbouatmailru@...il.com>
To:	Rhyland Klein <rklein@...dia.com>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 5/5] power: sbs-battery: Change power supply name

On Mon, Dec 05, 2011 at 03:58:07PM -0800, Rhyland Klein wrote:
>  static int sbs_read_word_data(struct i2c_client *client, u8 address)
> @@ -681,15 +682,25 @@ static int __devinit sbs_probe(struct i2c_client *client,
>  	struct sbs_platform_data *pdata = client->dev.platform_data;
>  	int rc;
>  	int irq;
> +	char *name;
>  
> -	chip = kzalloc(sizeof(struct sbs_info), GFP_KERNEL);
> -	if (!chip)
> +	name = kasprintf(GFP_KERNEL, "%s-%s", "sbs", dev_name(&client->dev));

Mm... why not just

kasprintf(GFP_KERNEL, "sbs-%s", dev_name(&client->dev)) ?

> +	if (!name) {
> +		dev_err(&client->dev, "Failed to allocate device name\n");
>  		return -ENOMEM;
> +	}
> +
> +	chip = kzalloc(sizeof(struct sbs_info), GFP_KERNEL);
> +	if (!chip) {
> +		rc = -ENOMEM;
> +		goto exit_free_name;
> +	}
>  
>  	chip->client = client;
>  	chip->enable_detection = false;
>  	chip->gpio_detect = false;
> -	chip->power_supply.name = "battery";
> +	chip->name = name;
> +	chip->power_supply.name = name;
>  	chip->power_supply.type = POWER_SUPPLY_TYPE_BATTERY;
>  	chip->power_supply.properties = sbs_properties;
>  	chip->power_supply.num_properties = ARRAY_SIZE(sbs_properties);
> @@ -774,6 +785,9 @@ exit_psupply:
>  
>  	kfree(chip);
>  
> +exit_free_name:
> +	kfree(name);
> +
>  	return rc;
>  }
>  
> @@ -790,6 +804,7 @@ static int __devexit sbs_remove(struct i2c_client *client)
>  
>  	cancel_delayed_work_sync(&chip->work);
>  
> +	kfree(chip->name);

I think you don't really need chip->name.

power_supply_unregister() won't touch power_supply.name, so
you can kfree(chip->power_supply.name);

Otherwise, the patch looks great.

Thanks!

-- 
Anton Vorontsov
Email: cbouatmailru@...il.com
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