On 02-07-21, 11:36, Jie Deng wrote:
> OK. Let's add the following two lines to make sure that msg_buf is only
> sent when the msgs len is not zero. And backend judges whether it is
> a zero-length request by checking the number of elements received.
>
> + if (msgs[i].len) {
> reqs[i].buf = i2c_get_dma_safe_msg_buf(&msgs[i], 1);
> if (!reqs[i].buf)
> break;
>
> sg_init_one(&msg_buf, reqs[i].buf, msgs[i].len);
>
> if (msgs[i].flags & I2C_M_RD)
> sgs[outcnt + incnt++] = &msg_buf;
> else
> sgs[outcnt++] = &msg_buf;
> +}
Perfect. Thanks.
--
viresh
