Commit 05854d48 authored Nov 05, 2020 by Deepak R Varma Committed by Daniel Vetter Nov 10, 2020

drm/vgem: replace idr_init() by idr_init_base()

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 6ce711f2 ("idr: Make 1-based IDRs more efficient")

Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20201105173646.GA41732@localhost

parent a5d704d3

drivers/gpu/drm/vgem/vgem_fence.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}