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* [Intel-gfx] [PATCH] drm/i915/gvt: replace idr_init() by idr_init_base()
@ 2020-11-04 12:15 Deepak R Varma
  2020-11-04 14:58 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Deepak R Varma @ 2020-11-04 12:15 UTC (permalink / raw)
  To: Zhenyu Wang, Zhi Wang, Jani Nikula, Joonas Lahtinen, Rodrigo Vivi,
	David Airlie, Daniel Vetter, intel-gvt-dev, intel-gfx, dri-devel,
	linux-kernel
  Cc: mh12gx2825

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@gmail.com>
---
 drivers/gpu/drm/i915/gvt/gvt.c  | 2 +-
 drivers/gpu/drm/i915/gvt/vgpu.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
index c7c561237883..45b492edbb19 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.c
+++ b/drivers/gpu/drm/i915/gvt/gvt.c
@@ -312,7 +312,7 @@ int intel_gvt_init_device(struct drm_i915_private *i915)
 
 	gvt_dbg_core("init gvt device\n");
 
-	idr_init(&gvt->vgpu_idr);
+	idr_init_base(&gvt->vgpu_idr, 1);
 	spin_lock_init(&gvt->scheduler.mmio_context_lock);
 	mutex_init(&gvt->lock);
 	mutex_init(&gvt->sched_lock);
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index f6d7e33c7099..1c8e63f84134 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -393,7 +393,7 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
 	mutex_init(&vgpu->dmabuf_lock);
 	INIT_LIST_HEAD(&vgpu->dmabuf_obj_list_head);
 	INIT_RADIX_TREE(&vgpu->page_track_tree, GFP_KERNEL);
-	idr_init(&vgpu->object_idr);
+	idr_init_base(&vgpu->object_idr, 1);
 	intel_vgpu_init_cfg_space(vgpu, param->primary);
 	vgpu->d3_entered = false;
 
-- 
2.25.1

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Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-11-04 12:15 [Intel-gfx] [PATCH] drm/i915/gvt: replace idr_init() by idr_init_base() Deepak R Varma
2020-11-04 14:58 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
2020-11-04 18:25 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork
2020-11-11  2:14 ` [Intel-gfx] [PATCH] " Zhenyu Wang

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