On Fri, 29 Jun 2012 16:35:25 +0530, Shubhrajyoti D wrote:
> In case of a NACK, it's wise to tell our clients
> drivers about how many bytes were actually transferred.
>
> Support this by adding an extra field to the struct
> i2c_msg which gets incremented the amount of bytes
> actually transferred.
>
> Signed-off-by: Shubhrajyoti D <shubhrajyoti@xxxxxx>
> Signed-off-by: Felipe Balbi <balbi@xxxxxx>
> ---
> include/linux/i2c.h | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/include/linux/i2c.h b/include/linux/i2c.h
> index ddfa041..0cb6b83 100644
> --- a/include/linux/i2c.h
> +++ b/include/linux/i2c.h
> @@ -547,6 +547,7 @@ struct i2c_msg {
> #define I2C_M_NO_RD_ACK 0x0800 /* if I2C_FUNC_PROTOCOL_MANGLING */
> #define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
> __u16 len; /* msg length */
> + __u16 actual; /* actual bytes transferred */
> __u8 *buf; /* pointer to msg data */
> };
>
Oh, as a side note: I don't much like the name "actual". It's not
really clear what it means. I don't have a perfect name to propose as a
replacement, but maybe "transferred" or even just "done" would do.
--
Jean Delvare
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