Re: [PATCH 3/3] drm: Use a normal idr allocation for the obj->name

Ville Syrjälä
2016-01-04T15:31:14Z

On Mon, Jan 04, 2016 at 10:11:01AM +0000, Chris Wilson wrote:
> Unlike the handle, the name table uses a sleeping mutex rather than a
> spinlock. The allocation is in a normal context, and we can use the
> simpler sleeping gfp_t, rather than have to take from the atomic
> reserves.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
> drivers/gpu/drm/drm_gem.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
> index ad955d7c99fd..1b0c2c127072 100644
> --- a/drivers/gpu/drm/drm_gem.c
> +++ b/drivers/gpu/drm/drm_gem.c
> @@ -642,7 +642,6 @@ drm_gem_flink_ioctl(struct drm_device *dev, void *data,
> return -ENOENT;
>
> mutex_lock(&dev->object_name_lock);
> - idr_preload(GFP_KERNEL);
> /* prevent races with concurrent gem_close. */
> if (obj->handle_count == 0) {
> ret = -ENOENT;
> @@ -650,7 +649,7 @@ drm_gem_flink_ioctl(struct drm_device *dev, void *data,
> }
>
> if (!obj->name) {
> - ret = idr_alloc(&dev->object_name_idr, obj, 1, 0, GFP_NOWAIT);
> + ret = idr_alloc(&dev->object_name_idr, obj, 1, 0, GFP_KERNEL);
> if (ret < 0)
> goto err;
>
> @@ -661,7 +660,6 @@ drm_gem_flink_ioctl(struct drm_device *dev, void *data,
> ret = 0;
>
> err:
> - idr_preload_end();
> mutex_unlock(&dev->object_name_lock);
> drm_gem_object_unreference_unlocked(obj);
> return ret;
> --
> 2.6.4
>
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--
Ville Syrjälä
Intel OTC