Hi Vinod,

On 20/12/2019 10.32, Vinod Koul wrote:

Hi Peter,

On 09-12-19, 11:43, Peter Ujfalusi wrote:

quoted

+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);

this looks good to me, only thing is we should check if people are
mixing the modes :)

desc_check_and_set_metadata_mode() does the checking to make sure that
the modes are not mixed.

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

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