Oct 23 2012

[media] cx18: 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: Andy Walls 
Signed-off-by: Mauro Carvalho Chehab 

---
 drivers/media/pci/cx18/cx18-i2c.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
 
diff --git a/drivers/media/pci/cx18/cx18-i2c.c b/drivers/media/pci/cx18/cx18-i2c.c
index 4908eb7..d61ac63 100644
--- a/drivers/media/pci/cx18/cx18-i2c.c
+++ b/drivers/media/pci/cx18/cx18-i2c.c
@@ -240,15 +240,13 @@ int init_cx18_i2c(struct cx18 *cx)
 
 	for (i = 0; i < 2; i++) {
 		/* Setup algorithm for adapter */
-		memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template,
-			sizeof(struct i2c_algo_bit_data));
+		cx->i2c_algo[i] = cx18_i2c_algo_template;
 		cx->i2c_algo_cb_data[i].cx = cx;
 		cx->i2c_algo_cb_data[i].bus_index = i;
 		cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i];
 
 		/* Setup adapter */
-		memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template,
-			sizeof(struct i2c_adapter));
+		cx->i2c_adap[i] = cx18_i2c_adap_template;
 		cx->i2c_adap[i].algo_data = &cx->i2c_algo[i];
 		sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name),
 				" #%d-%d", cx->instance, i);

qlambert