Re: [PATCH 1/5] add missing blob structure field for tag id

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On 02/06/2018 10:01 PM, Florian Echtler wrote:
> The SUR40 can recognize specific printed patterns directly in hardware;
> this information (i.e. the pattern id) is present but currently unused
> in the blob structure.
> 
> Signed-off-by: Florian Echtler <floe@xxxxxxxxxxxxxx>
> ---
>  drivers/input/touchscreen/sur40.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
> index f16f835..8375b06 100644
> --- a/drivers/input/touchscreen/sur40.c
> +++ b/drivers/input/touchscreen/sur40.c
> @@ -81,7 +81,10 @@ struct sur40_blob {
>  
>  	__le32 area;       /* size in pixels/pressure (?) */
>  
> -	u8 padding[32];
> +	u8 padding[24];
> +
> +	__le32 tag_id;     /* valid when type == 0x04 (SUR40_TAG) */
> +	__le32 unknown;
>  
>  } __packed;
>  
> 

Usually new fields are added before the padding, not after.

Unless there is a good reason for this I'd change this.

Regards,

	Hans
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