linux-kernel - Re: [PATCH v2 1/2] dmaengine: Add metadata_ops for dma_async_tx

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Message-ID: <6ba92876-899f-5bf2-e494-259e1e680750@ti.com>
Date:   Tue, 11 Sep 2018 15:33:51 +0300
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     Vinod <vkoul@...nel.org>
CC:     <dan.j.williams@...el.com>, <dmaengine@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <lars@...afoo.de>,
        <radheys@...inx.com>
Subject: Re: [PATCH v2 1/2] dmaengine: Add metadata_ops for
 dma_async_tx_descriptor

Vinod,

On 2018-09-11 10:33, Vinod wrote:
>> +int dmaengine_desc_attach_metadata(struct dma_async_tx_descriptor *desc,
>> +				   void *data, size_t len)
>> +{
>> +	int ret;
>> +
>> +	if (!desc)
>> +		return -EINVAL;
>> +
>> +	ret = desc_check_and_set_metadata_mode(desc, DESC_METADATA_CLIENT);
>> +	if (ret)
>> +		return ret;
>> +
>> +	if (!desc->metadata_ops || !desc->metadata_ops->attach)
>> +		return -ENOTSUPP;
>> +
>> +	return desc->metadata_ops->attach(desc, data, len);
>> +}
>> +EXPORT_SYMBOL(dmaengine_desc_attach_metadata);
> 
> EXPORT_SYMBOL_GPL ?

Sure, I think I have looked at
dma_async_tx_descriptor_init/dmaengine_get_unmap_data/dma_issue_pending_all/etc
they have EXPORT_SYMBOL()

- Péter

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