On Thu, Nov 05, 2020 at 11:06:46PM +0530, Deepak R Varma wrote:
> idr_init() uses base 0 which is an invalid identifier. The new function
> idr_init_base allows IDR to set the ID lookup from base 1. This avoids
> all lookups that otherwise starts from 0 since 0 is always unused.
>
> References: commit 6ce711f27500 ("idr: Make 1-based IDRs more efficient")
>
> Signed-off-by: Deepak R Varma <mh12gx2825@xxxxxxxxx>
Applied to drm-misc-next, thanks fory our patch.
-Daniel
> ---
> Changes since v1:
> - Changes suggested by Daniel Vetter:
> 1. Correct typo in patch summary
> 2. cc intel-gfx to get the patch through CI bot test
>
> drivers/gpu/drm/vgem/vgem_fence.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/vgem/vgem_fence.c b/drivers/gpu/drm/vgem/vgem_fence.c
> index 17f32f550dd9..2902dc6e64fa 100644
> --- a/drivers/gpu/drm/vgem/vgem_fence.c
> +++ b/drivers/gpu/drm/vgem/vgem_fence.c
> @@ -233,7 +233,7 @@ int vgem_fence_signal_ioctl(struct drm_device *dev,
> int vgem_fence_open(struct vgem_file *vfile)
> {
> mutex_init(&vfile->fence_mutex);
> - idr_init(&vfile->fence_idr);
> + idr_init_base(&vfile->fence_idr, 1);
>
> return 0;
> }
> --
> 2.25.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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