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drm/msm: Switch idr_lock to spinlock

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[ Upstream commit e4f020c6a05db73eac49b7c3b3650251be374200 ]

Needed to idr_preload() which returns with preemption disabled.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/527846/
Link: https://lore.kernel.org/r/20230320144356.803762-11-robdclark@gmail.com
Stable-dep-of: 1b5d0ddcb34a ("drm/msm: Disallow submit with fence id 0")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Rob Clark 2023-03-20 07:43:32 -07:00 committed by Greg Kroah-Hartman
parent d722661362
commit 3398e8b283
4 changed files with 9 additions and 11 deletions
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6
drivers/gpu/drm/msm/msm_drv.c
View File

@ -932,13 +932,11 @@ static int wait_fence(struct msm_gpu_submitqueue *queue, uint32_t fence_id,
* retired, so if the fence is not found it means there is nothing
* to wait for
*/
ret = mutex_lock_interruptible(&queue->idr_lock);
if (ret)
return ret;
spin_lock(&queue->idr_lock);
fence = idr_find(&queue->fence_idr, fence_id);
if (fence)
fence = dma_fence_get_rcu(fence);
mutex_unlock(&queue->idr_lock);
spin_unlock(&queue->idr_lock);
if (!fence)
return 0;

10
drivers/gpu/drm/msm/msm_gem_submit.c
View File

@ -72,9 +72,9 @@ void __msm_gem_submit_destroy(struct kref *kref)
unsigned i;
if (submit->fence_id) {
mutex_lock(&submit->queue->idr_lock);
spin_lock(&submit->queue->idr_lock);
idr_remove(&submit->queue->fence_idr, submit->fence_id);
mutex_unlock(&submit->queue->idr_lock);
spin_unlock(&submit->queue->idr_lock);
}
dma_fence_put(submit->user_fence);
@ -866,7 +866,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
submit->nr_cmds = i;
mutex_lock(&queue->idr_lock);
spin_lock(&queue->idr_lock);
/*
* If using userspace provided seqno fence, validate that the id
@ -876,7 +876,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
*/
if ((args->flags & MSM_SUBMIT_FENCE_SN_IN) &&
idr_find(&queue->fence_idr, args->fence)) {
mutex_unlock(&queue->idr_lock);
spin_unlock(&queue->idr_lock);
ret = -EINVAL;
goto out;
}
@ -910,7 +910,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
INT_MAX, GFP_KERNEL);
}
mutex_unlock(&queue->idr_lock);
spin_unlock(&queue->idr_lock);
if (submit->fence_id < 0) {
ret = submit->fence_id;

2
drivers/gpu/drm/msm/msm_gpu.h
View File

@ -500,7 +500,7 @@ struct msm_gpu_submitqueue {
struct msm_file_private *ctx;
struct list_head node;
struct idr fence_idr;
struct mutex idr_lock;
struct spinlock idr_lock;
struct mutex lock;
struct kref ref;
struct drm_sched_entity *entity;

2
drivers/gpu/drm/msm/msm_submitqueue.c
View File

@ -200,7 +200,7 @@ int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
*id = queue->id;
idr_init(&queue->fence_idr);
mutex_init(&queue->idr_lock);
spin_lock_init(&queue->idr_lock);
mutex_init(&queue->lock);
list_add_tail(&queue->node, &ctx->submitqueues);