diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index 51c57a47e5fc..ec94da2d4b8b 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -424,7 +424,7 @@ static ssize_t out_mode_store(struct device *dev,
 
 	if (strlen(buf) >= 10)
 		return -EINVAL;
-	if (sscanf(buf, "%10s", str) != 1)
+	if (sscanf(buf, "%s", str) != 1)
 		return -EINVAL;
 
 	mutex_lock(&drvdata->mem_lock);
@@ -526,7 +526,7 @@ static ssize_t mem_type_store(struct device *dev,
 
 	if (strlen(buf) >= 10)
 		return -EINVAL;
-	if (sscanf(buf, "%10s", str) != 1)
+	if (sscanf(buf, "%s", str) != 1)
 		return -EINVAL;
 
 	mutex_lock(&drvdata->mem_lock);