From f228a5b1703871632adb0918774386409cef05c5 Mon Sep 17 00:00:00 2001
From: Jaska Uimonen <jaska.uimonen@linux.intel.com>
Date: Wed, 15 Apr 2020 15:28:15 -0500
Subject: [PATCH] ASoC: SOF: topology: stop parsing when all tokens have been found
Git-commit: f228a5b1703871632adb0918774386409cef05c5
Patch-mainline: v5.8-rc1
References: jsc#SLE-16518

Optimize the parsing so that it will stop after all required tokens
have been found as there is no reason to continue after that.

Signed-off-by: Jaska Uimonen <jaska.uimonen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200415202816.934-24-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/sof/topology.c | 60 ++++++++++++++++++++++++++++++------------------
 1 file changed, 38 insertions(+), 22 deletions(-)

diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c
index a1287924a12d..d4d0c39d6e6e 100644
--- a/sound/soc/sof/topology.c
+++ b/sound/soc/sof/topology.c
@@ -769,13 +769,14 @@ static const struct sof_topology_token led_tokens[] = {
 	 get_token_u32, offsetof(struct snd_sof_led_control, direction), 0},
 };
 
-static void sof_parse_uuid_tokens(struct snd_soc_component *scomp,
-				  void *object,
-				  const struct sof_topology_token *tokens,
-				  int count,
-				  struct snd_soc_tplg_vendor_array *array)
+static int sof_parse_uuid_tokens(struct snd_soc_component *scomp,
+				 void *object,
+				 const struct sof_topology_token *tokens,
+				 int count,
+				 struct snd_soc_tplg_vendor_array *array)
 {
 	struct snd_soc_tplg_vendor_uuid_elem *elem;
+	int found = 0;
 	int i, j;
 
 	/* parse element by element */
@@ -795,17 +796,22 @@ static void sof_parse_uuid_tokens(struct snd_soc_component *scomp,
 			/* matched - now load token */
 			tokens[j].get_token(elem, object, tokens[j].offset,
 					    tokens[j].size);
+
+			found++;
 		}
 	}
+
+	return found;
 }
 
-static void sof_parse_string_tokens(struct snd_soc_component *scomp,
-				    void *object,
-				    const struct sof_topology_token *tokens,
-				    int count,
-				    struct snd_soc_tplg_vendor_array *array)
+static int sof_parse_string_tokens(struct snd_soc_component *scomp,
+				   void *object,
+				   const struct sof_topology_token *tokens,
+				   int count,
+				   struct snd_soc_tplg_vendor_array *array)
 {
 	struct snd_soc_tplg_vendor_string_elem *elem;
+	int found = 0;
 	int i, j;
 
 	/* parse element by element */
@@ -825,19 +831,24 @@ static void sof_parse_string_tokens(struct snd_soc_component *scomp,
 			/* matched - now load token */
 			tokens[j].get_token(elem, object, tokens[j].offset,
 					    tokens[j].size);
+
+			found++;
 		}
 	}
+
+	return found;
 }
 
-static void sof_parse_word_tokens(struct snd_soc_component *scomp,
-				  void *object,
-				  const struct sof_topology_token *tokens,
-				  int count,
-				  struct snd_soc_tplg_vendor_array *array)
+static int sof_parse_word_tokens(struct snd_soc_component *scomp,
+				 void *object,
+				 const struct sof_topology_token *tokens,
+				 int count,
+				 struct snd_soc_tplg_vendor_array *array)
 {
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_soc_tplg_vendor_value_elem *elem;
 	size_t size = sizeof(struct sof_ipc_dai_dmic_pdm_ctrl);
+	int found = 0;
 	int i, j;
 	u32 offset;
 	u32 *index = NULL;
@@ -897,8 +908,12 @@ static void sof_parse_word_tokens(struct snd_soc_component *scomp,
 			tokens[j].get_token(elem, object,
 					    offset + tokens[j].offset,
 					    tokens[j].size);
+
+			found++;
 		}
 	}
+
+	return found;
 }
 
 static int sof_parse_tokens(struct snd_soc_component *scomp,
@@ -908,9 +923,10 @@ static int sof_parse_tokens(struct snd_soc_component *scomp,
 			    struct snd_soc_tplg_vendor_array *array,
 			    int priv_size)
 {
+	int found = 0;
 	int asize;
 
-	while (priv_size > 0) {
+	while (priv_size > 0 && found < count) {
 		asize = le32_to_cpu(array->size);
 
 		/* validate asize */
@@ -931,19 +947,19 @@ static int sof_parse_tokens(struct snd_soc_component *scomp,
 		/* call correct parser depending on type */
 		switch (le32_to_cpu(array->type)) {
 		case SND_SOC_TPLG_TUPLE_TYPE_UUID:
-			sof_parse_uuid_tokens(scomp, object, tokens, count,
-					      array);
+			found += sof_parse_uuid_tokens(scomp, object, tokens,
+						       count, array);
 			break;
 		case SND_SOC_TPLG_TUPLE_TYPE_STRING:
-			sof_parse_string_tokens(scomp, object, tokens, count,
-						array);
+			found += sof_parse_string_tokens(scomp, object, tokens,
+							 count, array);
 			break;
 		case SND_SOC_TPLG_TUPLE_TYPE_BOOL:
 		case SND_SOC_TPLG_TUPLE_TYPE_BYTE:
 		case SND_SOC_TPLG_TUPLE_TYPE_WORD:
 		case SND_SOC_TPLG_TUPLE_TYPE_SHORT:
-			sof_parse_word_tokens(scomp, object, tokens, count,
-					      array);
+			found += sof_parse_word_tokens(scomp, object, tokens,
+						       count, array);
 			break;
 		default:
 			dev_err(scomp->dev, "error: unknown token type %d\n",
-- 
2.16.4