From: Gustavo A. R. Silva <garsilva@embeddedor.com>
Date: Mon, 10 Jul 2017 01:15:36 +0000 (-0400)
Subject: media: ddbridge: constify i2c_algorithm structure
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=618e8aac3d7ccbf49b170181a6f3a418ba6e5419;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

media: ddbridge: constify i2c_algorithm structure

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>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---

diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c b/drivers/media/pci/ddbridge/ddbridge-core.c
index e762396730db..ec41804d78c7 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -207,7 +207,7 @@ static u32 ddb_i2c_functionality(struct i2c_adapter *adap)
 	return I2C_FUNC_SMBUS_EMUL;
 }
 
-static struct i2c_algorithm ddb_i2c_algo = {
+static const struct i2c_algorithm ddb_i2c_algo = {
 	.master_xfer   = ddb_i2c_master_xfer,
 	.functionality = ddb_i2c_functionality,
 };