audio: chain_dma: Fix error handling in chain_init()

If the dma_request_channel() for the link fails we print the error, jump
to error_host to release the channel and return with success.
This can lead to firmware crash later on when the ChainDMA  is started.

Correct the error handling by setting the err correctly in this case and
also update the prints to print unique strings and information to help
debugging.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

src/audio/chain_dma.c

@@ -458,31 +458,34 @@ __cold static int chain_init(struct comp_dev *dev, void *addr, size_t length)
 	channel = cd->host_connector_node_id.f.v_index;
 	channel = dma_request_channel(cd->dma_host->z_dev, &channel);
 	if (channel < 0) {
-		comp_err(dev, "dma_request_channel() failed");
-		return -EINVAL;
+		comp_err(dev, "host dma_request_channel() failed for %u",
+			 cd->host_connector_node_id.f.v_index);
+		return channel;
 	}
 
 	cd->chan_host = &cd->dma_host->chan[channel];
 
 	err = dma_config(cd->dma_host->z_dev, cd->chan_host->index, dma_cfg_host);
 	if (err < 0) {
-		comp_err(dev, "dma_config() failed");
+		comp_err(dev, "host dma_config() failed for %d", channel);
 		goto error_host;
 	}
 
 	/* get link DMA channel */
 	channel = cd->link_connector_node_id.f.v_index;
 	channel = dma_request_channel(cd->dma_link->z_dev, &channel);
 	if (channel < 0) {
-		comp_err(dev, "dma_request_channel() failed");
+		comp_err(dev, "link dma_request_channel() failed for %u",
+			 cd->link_connector_node_id.f.v_index);
+		err = channel;
 		goto error_host;
 	}
 
 	cd->chan_link = &cd->dma_link->chan[channel];
 
 	err = dma_config(cd->dma_link->z_dev, cd->chan_link->index, dma_cfg_link);
 	if (err < 0) {
-		comp_err(dev, "dma_config() failed");
+		comp_err(dev, "link dma_config() failed for %d", channel);
 		goto error_link;
 	}
 	return 0;