ath10k: clean up cont frag desc init code

This makes the code easier to extend and re-use.

While at it fix _warn to _err. Other than that
there are no functional changes.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/htt_tx.c

@@ -97,6 +97,41 @@ void ath10k_htt_tx_free_msdu_id(struct ath10k_htt *htt, u16 msdu_id)
 	idr_remove(&htt->pending_tx, msdu_id);
 }
 
+static void ath10k_htt_tx_free_cont_frag_desc(struct ath10k_htt *htt)
+{
+	size_t size;
+
+	if (!htt->frag_desc.vaddr)
+		return;
+
+	size = htt->max_num_pending_tx * sizeof(struct htt_msdu_ext_desc);
+
+	dma_free_coherent(htt->ar->dev,
+			  size,
+			  htt->frag_desc.vaddr,
+			  htt->frag_desc.paddr);
+}
+
+static int ath10k_htt_tx_alloc_cont_frag_desc(struct ath10k_htt *htt)
+{
+	struct ath10k *ar = htt->ar;
+	size_t size;
+
+	if (!ar->hw_params.continuous_frag_desc)
+		return 0;
+
+	size = htt->max_num_pending_tx * sizeof(struct htt_msdu_ext_desc);
+	htt->frag_desc.vaddr = dma_alloc_coherent(ar->dev, size,
+						  &htt->frag_desc.paddr,
+						  GFP_KERNEL);
+	if (!htt->frag_desc.vaddr) {
+		ath10k_err(ar, "failed to alloc fragment desc memory\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
 int ath10k_htt_tx_alloc(struct ath10k_htt *htt)
 {
 	struct ath10k *ar = htt->ar;
@@ -118,20 +153,12 @@ int ath10k_htt_tx_alloc(struct ath10k_htt *htt)
 		goto free_idr_pending_tx;
 	}
 
-	if (!ar->hw_params.continuous_frag_desc)
-		goto skip_frag_desc_alloc;
-
-	size = htt->max_num_pending_tx * sizeof(struct htt_msdu_ext_desc);
-	htt->frag_desc.vaddr = dma_alloc_coherent(ar->dev, size,
-						  &htt->frag_desc.paddr,
-						  GFP_KERNEL);
-	if (!htt->frag_desc.vaddr) {
-		ath10k_warn(ar, "failed to alloc fragment desc memory\n");
-		ret = -ENOMEM;
+	ret = ath10k_htt_tx_alloc_cont_frag_desc(htt);
+	if (ret) {
+		ath10k_err(ar, "failed to alloc cont frag desc: %d\n", ret);
 		goto free_txbuf;
 	}
 
-skip_frag_desc_alloc:
 	return 0;
 
 free_txbuf:
@@ -139,8 +166,10 @@ int ath10k_htt_tx_alloc(struct ath10k_htt *htt)
 			  sizeof(struct ath10k_htt_txbuf);
 	dma_free_coherent(htt->ar->dev, size, htt->txbuf.vaddr,
 			  htt->txbuf.paddr);
+
 free_idr_pending_tx:
 	idr_destroy(&htt->pending_tx);
+
 	return ret;
 }
 
@@ -174,12 +203,7 @@ void ath10k_htt_tx_free(struct ath10k_htt *htt)
 				  htt->txbuf.paddr);
 	}
 
-	if (htt->frag_desc.vaddr) {
-		size = htt->max_num_pending_tx *
-				  sizeof(struct htt_msdu_ext_desc);
-		dma_free_coherent(htt->ar->dev, size, htt->frag_desc.vaddr,
-				  htt->frag_desc.paddr);
-	}
+	ath10k_htt_tx_free_cont_frag_desc(htt);
 }
 
 void ath10k_htt_htc_tx_complete(struct ath10k *ar, struct sk_buff *skb)