RE: [PATCH v18 01/19] EDAC: Add support for EDAC device features control

[Shiju Jose <shiju.jose@huawei.com>]

>-----Original Message-----
>From: Borislav Petkov <bp@alien8.de>
>Sent: 06 January 2025 13:38
>To: Shiju Jose <shiju.jose@huawei.com>
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>Subject: Re: [PATCH v18 01/19] EDAC: Add support for EDAC device features
>control
>
>On Mon, Jan 06, 2025 at 12:09:57PM +0000, shiju.jose@huawei.com wrote:
>> +int edac_dev_register(struct device *parent, char *name,
>> +		      void *private, int num_features,
>> +		      const struct edac_dev_feature *ras_features) {
>> +	const struct attribute_group **ras_attr_groups;
>> +	struct edac_dev_feat_ctx *ctx;
>> +	int attr_gcnt = 0;
>> +	int ret, feat;
>> +
>> +	if (!parent || !name || !num_features || !ras_features)
>> +		return -EINVAL;
>> +
>> +	/* Double parse to make space for attributes */
>> +	for (feat = 0; feat < num_features; feat++) {
>> +		switch (ras_features[feat].ft_type) {
>> +		/* Add feature specific code */
>> +		default:
>> +			return -EINVAL;
>> +		}
>> +	}
>> +
>> +	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
>> +	if (!ctx)
>> +		return -ENOMEM;
>> +
>> +	ras_attr_groups = kcalloc(attr_gcnt + 1, sizeof(*ras_attr_groups),
>GFP_KERNEL);
>> +	if (!ras_attr_groups) {
>> +		ret = -ENOMEM;
>> +		goto ctx_free;
>> +	}
>> +
>> +	attr_gcnt = 0;
>> +	for (feat = 0; feat < num_features; feat++, ras_features++) {
>> +		switch (ras_features->ft_type) {
>> +		/* Add feature specific code */
>> +		default:
>> +			ret = -EINVAL;
>> +			goto groups_free;
>> +		}
>> +	}
>> +
>> +	ctx->dev.parent = parent;
>> +	ctx->dev.bus = edac_get_sysfs_subsys();
>> +	ctx->dev.type = &edac_dev_type;
>> +	ctx->dev.groups = ras_attr_groups;
>> +	ctx->private = private;
>> +	dev_set_drvdata(&ctx->dev, ctx);
>> +
>> +	ret = dev_set_name(&ctx->dev, name);
>> +	if (ret)
>> +		goto groups_free;
>> +
>> +	ret = device_register(&ctx->dev);
>> +	if (ret) {
>> +		put_device(&ctx->dev);
>> +		return ret;
>
>Who is freeing ctx and ras_attr_groups when you return here?

Hi Boris,

ctx and ras_attr_groups are freed in the callback
function  for release  edac_dev_release(struct device *dev).

Thanks,
Shiju

>
>--
>Regards/Gruss,
>    Boris.
>
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