Oct 23 2012

[media] tuners/tda18271: Replace memcpy with struct assignment 

Author: Ezequiel Garcia <elezegarcia@gmail.com>

This kind of memcpy() is error-prone. Its replacement with a struct
assignment is prefered because it's type-safe and much easier to read.
Found by coccinelle. Hand patched and reviewed.
Tested by compilation only.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// 
@@
identifier struct_name;
struct struct_name to;
struct struct_name from;
expression E;
@@
-memcpy(&(to), &(from), E);
+to = from;
// 

Signed-off-by: Peter Senna Tschudin 
Signed-off-by: Ezequiel Garcia 
Signed-off-by: Mauro Carvalho Chehab 

---
 drivers/media/tuners/tda18271-maps.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
 
diff --git a/drivers/media/tuners/tda18271-maps.c b/drivers/media/tuners/tda18271-maps.c
index fb881c6..b62e925 100644
--- a/drivers/media/tuners/tda18271-maps.c
+++ b/drivers/media/tuners/tda18271-maps.c
@@ -1290,13 +1290,11 @@ int tda18271_assign_map_layout(struct dvb_frontend *fe)
 	switch (priv->id) {
 	case TDA18271HDC1:
 		priv->maps = &tda18271c1_map_layout;
-		memcpy(&priv->std, &tda18271c1_std_map,
-		       sizeof(struct tda18271_std_map));
+		priv->std = tda18271c1_std_map;
 		break;
 	case TDA18271HDC2:
 		priv->maps = &tda18271c2_map_layout;
-		memcpy(&priv->std, &tda18271c2_std_map,
-		       sizeof(struct tda18271_std_map));
+		priv->std = tda18271c2_std_map;
 		break;
 	default:
 		ret = -EINVAL;

qlambert