linux-kernel - Re: [PATCH 6/6] drm: Add four ioctls for managing drm mode object leases [v3]

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Message-ID: <CAPM=9txb8p0McchfwMc3Z+-OSqEJvgd32sAmmV_x+xmiYpJ2Og@mail.gmail.com>
Date:   Thu, 5 Oct 2017 13:17:02 +1000
From:   Dave Airlie <airlied@...il.com>
To:     Keith Packard <keithp@...thp.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Dave Airlie <airlied@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH 6/6] drm: Add four ioctls for managing drm mode object
 leases [v3]

> ---
>  drivers/gpu/drm/drm_ioctl.c |   4 +
>  drivers/gpu/drm/drm_lease.c | 270 ++++++++++++++++++++++++++++++++++++++++++++
>  include/drm/drm_lease.h     |  12 ++
>  include/uapi/drm/drm.h      |   5 +
>  include/uapi/drm/drm_mode.h |  64 +++++++++++
>  5 files changed, 355 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
> index a5a259964c7d..0a43e82d3f06 100644
> --- a/drivers/gpu/drm/drm_ioctl.c
> +++ b/drivers/gpu/drm/drm_ioctl.c
> @@ -657,6 +657,10 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
>                       DRM_UNLOCKED|DRM_RENDER_ALLOW),
>         DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, drm_syncobj_fd_to_handle_ioctl,
>                       DRM_UNLOCKED|DRM_RENDER_ALLOW),
> +       DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_LEASE, drm_mode_create_lease_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> +       DRM_IOCTL_DEF(DRM_IOCTL_MODE_LIST_LESSEES, drm_mode_list_lessees_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> +       DRM_IOCTL_DEF(DRM_IOCTL_MODE_GET_LEASE, drm_mode_get_lease_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> +       DRM_IOCTL_DEF(DRM_IOCTL_MODE_REVOKE_LEASE, drm_mode_revoke_lease_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
>  };
>
>  #define DRM_CORE_IOCTL_COUNT   ARRAY_SIZE( drm_ioctls )
> diff --git a/drivers/gpu/drm/drm_lease.c b/drivers/gpu/drm/drm_lease.c
> index a8bd4bdd2977..f233d8b488f2 100644
> --- a/drivers/gpu/drm/drm_lease.c
> +++ b/drivers/gpu/drm/drm_lease.c
> @@ -23,6 +23,8 @@
>  #define drm_for_each_lessee(lessee, lessor) \
>         list_for_each_entry((lessee), &(lessor)->lessees, lessee_list)
>
> +static uint64_t drm_lease_idr_object;

What is this for? ^^

> +               ret = idr_alloc(&leases, &drm_lease_idr_object , object_id, object_id + 1, GFP_KERNEL);

You can just pass NULL here.

Dave.