From d6c6113bfe19af514128163a6d176437d45b7325 Mon Sep 17 00:00:00 2001 From: Hang Yuan Date: Mon, 30 Jul 2018 10:52:53 +0800 Subject: [PATCH] drm/i915/gvt: initialize dmabuf mutex in vgpu_create Currently, the mutex used in GVT dmabuf support is not initialized until vgpu device is opened. If one vgpu device is opened and then removed, the mutex will be used in vgpu remove operation without initialization. This patch initializes the mutex in vgpu create operation to avoid the problem. Fixes: e546e281d33d("drm/i915/gvt: Dmabuf support for GVT-g") Signed-off-by: Hang Yuan Signed-off-by: Zhenyu Wang --- drivers/gpu/drm/i915/gvt/kvmgt.c | 1 - drivers/gpu/drm/i915/gvt/vgpu.c | 1 + 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 80b49a1..31986c1 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -1615,7 +1615,6 @@ static int kvmgt_guest_init(struct mdev_device *mdev) kvmgt_protect_table_init(info); gvt_cache_init(vgpu); - mutex_init(&vgpu->dmabuf_lock); init_completion(&vgpu->vblank_done); info->track_node.track_write = kvmgt_page_track_write; diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c index ce0d93b..a4e8e3c 100644 --- a/drivers/gpu/drm/i915/gvt/vgpu.c +++ b/drivers/gpu/drm/i915/gvt/vgpu.c @@ -379,6 +379,7 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt, vgpu->gvt = gvt; vgpu->sched_ctl.weight = param->weight; mutex_init(&vgpu->vgpu_lock); + 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); -- 2.7.4