[PATCH] saa7146: constify i2c_algorithm structure

[Gustavo A. R. Silva]

Check for i2c_algorithm structures that are only stored in
the algo field of an i2c_adapter structure. This field is
declared const, so i2c_algorithm structures that have this
property can be declared as const also.

This issue was identified using Coccinelle and the following
semantic patch:

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct i2c_algorithm i@p = { ... };

@ok@
identifier r.i;
struct i2c_adapter e;
position p;
@@
e.algo = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct i2c_algorithm i = { ... };

Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx>
---
 drivers/media/common/saa7146/saa7146_i2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/common/saa7146/saa7146_i2c.c b/drivers/media/common/saa7146/saa7146_i2c.c
index 239a2db..75897f9 100644
--- a/drivers/media/common/saa7146/saa7146_i2c.c
+++ b/drivers/media/common/saa7146/saa7146_i2c.c
@@ -395,7 +395,7 @@ static int saa7146_i2c_xfer(struct i2c_adapter* adapter, struct i2c_msg *msg, in
 /* i2c-adapter helper functions                                              */
 
 /* exported algorithm data */
-static struct i2c_algorithm saa7146_algo = {
+static const struct i2c_algorithm saa7146_algo = {
 	.master_xfer	= saa7146_i2c_xfer,
 	.functionality	= saa7146_i2c_func,
 };
-- 
2.5.0