From: Gustavo A. R. Silva <garsilva@embeddedor.com>
Date: Mon, 10 Jul 2017 01:10:00 +0000 (-0400)
Subject: media: mantis: constify i2c_algorithm structure
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e46ab9dc4a2bffad9f49123136b22f6eec88a82c;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

media: mantis: 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/mantis/mantis_i2c.c b/drivers/media/pci/mantis/mantis_i2c.c
index d72ee47dc6e4..496c10dfc4df 100644
--- a/drivers/media/pci/mantis/mantis_i2c.c
+++ b/drivers/media/pci/mantis/mantis_i2c.c
@@ -212,7 +212,7 @@ static u32 mantis_i2c_func(struct i2c_adapter *adapter)
 	return I2C_FUNC_SMBUS_EMUL;
 }
 
-static struct i2c_algorithm mantis_algo = {
+static const struct i2c_algorithm mantis_algo = {
 	.master_xfer		= mantis_i2c_xfer,
 	.functionality		= mantis_i2c_func,
 };