From: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx>
generally the pdata needs to be a constant pointer in the device
state structure. This patch makes the pdata as a constant pointer
and alongside returns -EINVAL when pdata is NULL.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx>
Cc: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: davinci-linux-open-source@xxxxxxxxxxxxxxxxxxxx
---
drivers/media/i2c/ths7303.c | 15 ++++++++-------
1 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/media/i2c/ths7303.c b/drivers/media/i2c/ths7303.c
index af06187..b954195 100644
--- a/drivers/media/i2c/ths7303.c
+++ b/drivers/media/i2c/ths7303.c
@@ -35,7 +35,7 @@
struct ths7303_state {
struct v4l2_subdev sd;
- struct ths7303_platform_data pdata;
+ const struct ths7303_platform_data *pdata;
struct v4l2_bt_timings bt;
int std_id;
int stream_on;
@@ -89,7 +89,7 @@ int ths7303_setval(struct v4l2_subdev *sd, enum ths7303_filter_mode mode)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ths7303_state *state = to_state(sd);
- struct ths7303_platform_data *pdata = &state->pdata;
+ const struct ths7303_platform_data *pdata = state->pdata;
u8 val, sel = 0;
int err, disable = 0;
@@ -356,6 +356,11 @@ static int ths7303_probe(struct i2c_client *client,
struct ths7303_state *state;
struct v4l2_subdev *sd;
+ if (pdata == NULL) {
+ dev_err(&client->dev, "No platform data\n");
+ return -EINVAL;
+ }
+
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
@@ -367,11 +372,7 @@ static int ths7303_probe(struct i2c_client *client,
if (!state)
return -ENOMEM;
- if (!pdata)
- v4l_warn(client, "No platform data, using default data!\n");
- else
- state->pdata = *pdata;
-
+ state->pdata = pdata;
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &ths7303_ops);
--
1.7.0.4
--
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