[PATCH] dvb-ttusb-budget: constify i2c_algorithm structure

[PATCH] dvb-ttusb-budget: 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@embeddedor.com>
---
 drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
index 361e40b..22a488d 100644
--- a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
@@ -1640,7 +1640,7 @@ static void frontend_init(struct ttusb* ttusb)
 
 
 
-static struct i2c_algorithm ttusb_dec_algo = {
+static const struct i2c_algorithm ttusb_dec_algo = {
 	.master_xfer	= master_xfer,
 	.functionality	= functionality,
 };
-- 
2.5.0