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SubjectRe: [PATCH v2 2/2] PTP: add support for one-shot output
On Thu, Aug 29, 2019 at 12:58:25PM +0300, Felipe Balbi wrote:
> diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
> index 98ec1395544e..a407e5f76e2d 100644
> --- a/drivers/ptp/ptp_chardev.c
> +++ b/drivers/ptp/ptp_chardev.c
> @@ -177,9 +177,8 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
> err = -EFAULT;
> break;
> }
> - if ((req.perout.flags || req.perout.rsv[0] || req.perout.rsv[1]
> - || req.perout.rsv[2] || req.perout.rsv[3])
> - && cmd == PTP_PEROUT_REQUEST2) {
> + if ((req.perout.rsv[0] || req.perout.rsv[1] || req.perout.rsv[2]
> + || req.perout.rsv[3]) && cmd == PTP_PEROUT_REQUEST2) {

Please check that the reserved bits of req.perout.flags, namely
~PTP_PEROUT_ONE_SHOT, are clear.

> err = -EINVAL;
> break;
> } else if (cmd == PTP_PEROUT_REQUEST) {
> diff --git a/include/uapi/linux/ptp_clock.h b/include/uapi/linux/ptp_clock.h
> index 039cd62ec706..95840e5f5c53 100644
> --- a/include/uapi/linux/ptp_clock.h
> +++ b/include/uapi/linux/ptp_clock.h
> @@ -67,7 +67,9 @@ struct ptp_perout_request {
> struct ptp_clock_time start; /* Absolute start time. */
> struct ptp_clock_time period; /* Desired period, zero means disable. */
> unsigned int index; /* Which channel to configure. */
> - unsigned int flags; /* Reserved for future use. */
> +
> +#define PTP_PEROUT_ONE_SHOT BIT(0)
> + unsigned int flags;

@davem Any CodingStyle policy on #define within a struct? (Some
maintainers won't allow it.)

> unsigned int rsv[4]; /* Reserved for future use. */
> };
>
> --
> 2.23.0
>

Thanks,
Richard

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