[PATCH 1/3] drm/dp: Use non-cyclic idr

[Ville Syrjälä]

On Mon, Apr 22, 2019 at 07:56:26PM -0400, sunpeng.li at amd.com wrote:
> From: Leo Li <sunpeng.li at amd.com>
> 
> In preparation for adding aux devices for DP MST, make the IDR
> non-cyclic. That way, hotplug cycling MST devices won't needlessly
> increment the minor version index.
> 
> Signed-off-by: Leo Li <sunpeng.li at amd.com>

I don't recall any specific reason for the cyclic variant, so
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  drivers/gpu/drm/drm_dp_aux_dev.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c
> index 0e4f25d..6d84611 100644
> --- a/drivers/gpu/drm/drm_dp_aux_dev.c
> +++ b/drivers/gpu/drm/drm_dp_aux_dev.c
> @@ -80,8 +80,7 @@ static struct drm_dp_aux_dev *alloc_drm_dp_aux_dev(struct drm_dp_aux *aux)
>  	kref_init(&aux_dev->refcount);
>  
>  	mutex_lock(&aux_idr_mutex);
> -	index = idr_alloc_cyclic(&aux_idr, aux_dev, 0, DRM_AUX_MINORS,
> -				 GFP_KERNEL);
> +	index = idr_alloc(&aux_idr, aux_dev, 0, DRM_AUX_MINORS, GFP_KERNEL);
>  	mutex_unlock(&aux_idr_mutex);
>  	if (index < 0) {
>  		kfree(aux_dev);
> -- 
> 2.7.4

-- 
Ville Syrjälä
Intel