Hi Hugues,
On Thu, Feb 01, 2018 at 02:17:34PM +0100, Hugues Fruchet wrote:
> Fix module_param(virtual_channel) permissions.
> This problem was detected by checkpatch:
> $ scripts/checkpatch.pl -f drivers/media/i2c/ov5640.c
> ERROR: Use 4 digit octal (0777) not decimal permissions
> #131: FILE: drivers/media/i2c/ov5640.c:131:
> +module_param(virtual_channel, int, 0);
>
> Also explicitly set initial value to 0 for default value
> and add an error trace in case of virtual_channel not in
> the valid range of values.
>
> Signed-off-by: Hugues Fruchet <hugues.fruchet@xxxxxx>
> ---
> drivers/media/i2c/ov5640.c | 10 +++++++---
> 1 file changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
> index 696a28b..906f202 100644
> --- a/drivers/media/i2c/ov5640.c
> +++ b/drivers/media/i2c/ov5640.c
> @@ -127,8 +127,8 @@ struct ov5640_pixfmt {
> * FIXME: remove this when a subdev API becomes available
> * to set the MIPI CSI-2 virtual channel.
> */
> -static unsigned int virtual_channel;
> -module_param(virtual_channel, int, 0);
> +static unsigned int virtual_channel = 0;
> +module_param(virtual_channel, int, 0444);
Parameter type is unsigned int, please use uint here.
As also checkpatch reports, it is not necessary to initialize static
variables to 0.
> MODULE_PARM_DESC(virtual_channel,
> "MIPI CSI-2 virtual channel (0..3), default 0");
>
> @@ -1358,11 +1358,15 @@ static int ov5640_binning_on(struct ov5640_dev *sensor)
>
> static int ov5640_set_virtual_channel(struct ov5640_dev *sensor)
> {
> + struct i2c_client *client = sensor->i2c_client;
> u8 temp, channel = virtual_channel;
> int ret;
>
> - if (channel > 3)
> + if (channel > 3) {
> + dev_err(&client->dev, "%s: wrong virtual_channel parameter value, expected (0..3), got %d\n",
I understand you don't want to break error messages to 80 columns to
ease grep for errors, but you can break the line after "client->dev"
to make this less painful for the eyes.
Thanks
j
> + __func__, channel);
> return -EINVAL;
> + }
>
> ret = ov5640_read_reg(sensor, OV5640_REG_DEBUG_MODE, &temp);
> if (ret)
> --
> 1.9.1
>
