[PATCH v2 05/12] crypto: talitos - move code in current_desc_hdr() into a standalone function

[Paul Louvel <paul.louvel@bootlin.com>]

Previously added code in current_desc_hdr() in order to add support for
searching an offending descriptor inside a descriptor chain.

Move that code into a standalone function to improve readability.

Cc: stable@vger.kernel.org
Signed-off-by: Paul Louvel <paul.louvel@bootlin.com>
---
 drivers/crypto/talitos.c | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 3b1d8e34e86e..376e21e06056 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -530,6 +530,23 @@ DEF_TALITOS2_DONE(ch0, TALITOS2_ISR_CH_0_DONE)
 DEF_TALITOS2_DONE(ch0_2, TALITOS2_ISR_CH_0_2_DONE)
 DEF_TALITOS2_DONE(ch1_3, TALITOS2_ISR_CH_1_3_DONE)
 
+static __be32 search_desc_hdr_in_request(struct talitos_request *request,
+					 dma_addr_t cur_desc, bool is_sec1)
+{
+	struct talitos_edesc *edesc;
+
+	if (request->dma_desc == cur_desc) {
+		return request->desc->hdr;
+	} else if (is_sec1) {
+		list_for_each_entry(edesc, request->desc_chain, node) {
+			if (edesc->desc.next_desc == cpu_to_be32(cur_desc))
+				return list_next_entry(edesc, node)->desc.hdr;
+		}
+	}
+
+	return 0;
+}
+
 /*
  * locate current (offending) descriptor
  */
@@ -538,7 +555,6 @@ static __be32 current_desc_hdr(struct device *dev, int ch)
 	struct talitos_private *priv = dev_get_drvdata(dev);
 	bool is_sec1 = has_ftr_sec1(priv);
 	struct talitos_request *request;
-	struct talitos_edesc *edesc;
 	int tail, iter;
 	dma_addr_t cur_desc;
 	__be32 hdr = 0;
@@ -556,17 +572,7 @@ static __be32 current_desc_hdr(struct device *dev, int ch)
 	do {
 		request = &priv->chan[ch].fifo[iter];
 
-		if (request->dma_desc == cur_desc) {
-			hdr = request->desc->hdr;
-		} else if (is_sec1) {
-			list_for_each_entry(edesc, request->desc_chain, node) {
-				if (edesc->desc.next_desc ==
-				    cpu_to_be32(cur_desc))
-					hdr = list_next_entry(edesc, node)
-						      ->desc.hdr;
-			}
-		}
-
+		hdr = search_desc_hdr_in_request(request, cur_desc, is_sec1);
 		if (hdr)
 			break;
 

-- 
2.53.0