linux-kernel - Re: [PATCH v3 17/37] drm/i915: i915_gem

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Date:   Mon, 12 Sep 2022 03:22:16 +0200
From:   Andi Shyti <andi.shyti@...ux.intel.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Christian König <christian.koenig@....com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Thomas Hellström 
        <thomas.hellstrom@...ux.intel.com>,
        Andi Shyti <andi.shyti@...ux.intel.com>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 17/37] drm/i915: i915_gem_wait.c: fix a kernel-doc
 markup

Hi Mauro,

On Fri, Sep 09, 2022 at 09:34:24AM +0200, Mauro Carvalho Chehab wrote:
> The return codes for i915_gem_wait_ioctl() have identation issues,
> and will be displayed on a very confusing way. Use lists to improve
> its output.
> 
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@...nel.org>

Reviewed-by: Andi Shyti <andi.shyti@...ux.intel.com>

Andi

> ---
> 
> To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
> See [PATCH v3 00/37] at: https://lore.kernel.org/all/cover.1662708705.git.mchehab@kernel.org/
> 
>  drivers/gpu/drm/i915/gem/i915_gem_wait.c | 24 +++++++++++++-----------
>  1 file changed, 13 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_wait.c b/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> index 4a33ad2d122b..1fd5cff552ed 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_wait.c
> @@ -210,23 +210,25 @@ static unsigned long to_wait_timeout(s64 timeout_ns)
>   * @data: ioctl data blob
>   * @file: drm file pointer
>   *
> - * Returns 0 if successful, else an error is returned with the remaining time in
> - * the timeout parameter.
> - *  -ETIME: object is still busy after timeout
> - *  -ERESTARTSYS: signal interrupted the wait
> - *  -ENONENT: object doesn't exist
> - * Also possible, but rare:
> - *  -EAGAIN: incomplete, restart syscall
> - *  -ENOMEM: damn
> - *  -ENODEV: Internal IRQ fail
> - *  -E?: The add request failed
> - *
>   * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
>   * non-zero timeout parameter the wait ioctl will wait for the given number of
>   * nanoseconds on an object becoming unbusy. Since the wait itself does so
>   * without holding struct_mutex the object may become re-busied before this
>   * function completes. A similar but shorter * race condition exists in the busy
>   * ioctl
> + *
> + * Returns:
> + * 0 if successful, else an error is returned with the remaining time in
> + * the timeout parameter.
> + * * -ETIME: object is still busy after timeout
> + * * -ERESTARTSYS: signal interrupted the wait
> + * * -ENONENT: object doesn't exist
> + *
> + * Also possible, but rare:
> + * * -EAGAIN: incomplete, restart syscall
> + * * -ENOMEM: damn
> + * * -ENODEV: Internal IRQ fail
> + * * -E?: The add request failed
>   */
>  int
>  i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
> -- 
> 2.37.3