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From f8b577f45825b0adbad112489f01a3bf62298b2c Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 19 Oct 2015 08:29:41 -0700
Subject: [PATCH] drm/vc4: bo cache locking cleanup.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/vc4/vc4_bo.c | 22 +++++++++-------------
1 file changed, 9 insertions(+), 13 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_bo.c
+++ b/drivers/gpu/drm/vc4/vc4_bo.c
@@ -215,7 +215,6 @@ vc4_bo_cache_free_old(struct drm_device
struct vc4_dev *vc4 = to_vc4_dev(dev);
unsigned long expire_time = jiffies - msecs_to_jiffies(1000);
- mutex_lock(&vc4->bo_lock);
while (!list_empty(&vc4->bo_cache.time_list)) {
struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
struct vc4_bo, unref_head);
@@ -223,14 +222,12 @@ vc4_bo_cache_free_old(struct drm_device
mod_timer(&vc4->bo_cache.time_timer,
round_jiffies_up(jiffies +
msecs_to_jiffies(1000)));
- mutex_unlock(&vc4->bo_lock);
return;
}
vc4_bo_remove_from_cache(bo);
vc4_bo_destroy(bo);
}
- mutex_unlock(&vc4->bo_lock);
}
/* Called on the last userspace/kernel unreference of the BO. Returns
@@ -245,29 +242,24 @@ void vc4_free_object(struct drm_gem_obje
struct vc4_bo *bo = to_vc4_bo(gem_bo);
struct list_head *cache_list;
+ mutex_lock(&vc4->bo_lock);
/* If the object references someone else's memory, we can't cache it.
*/
if (gem_bo->import_attach) {
- mutex_lock(&vc4->bo_lock);
vc4_bo_destroy(bo);
- mutex_unlock(&vc4->bo_lock);
- return;
+ goto out;
}
/* Don't cache if it was publicly named. */
if (gem_bo->name) {
- mutex_lock(&vc4->bo_lock);
vc4_bo_destroy(bo);
- mutex_unlock(&vc4->bo_lock);
- return;
+ goto out;
}
- mutex_lock(&vc4->bo_lock);
cache_list = vc4_get_cache_list_for_size(dev, gem_bo->size);
if (!cache_list) {
vc4_bo_destroy(bo);
- mutex_unlock(&vc4->bo_lock);
- return;
+ goto out;
}
if (bo->validated_shader) {
@@ -282,9 +274,11 @@ void vc4_free_object(struct drm_gem_obje
vc4->bo_stats.num_cached++;
vc4->bo_stats.size_cached += gem_bo->size;
- mutex_unlock(&vc4->bo_lock);
vc4_bo_cache_free_old(dev);
+
+out:
+ mutex_unlock(&vc4->bo_lock);
}
static void vc4_bo_cache_time_work(struct work_struct *work)
@@ -293,7 +287,9 @@ static void vc4_bo_cache_time_work(struc
container_of(work, struct vc4_dev, bo_cache.time_work);
struct drm_device *dev = vc4->dev;
+ mutex_lock(&vc4->bo_lock);
vc4_bo_cache_free_old(dev);
+ mutex_unlock(&vc4->bo_lock);
}
static void vc4_bo_cache_time_timer(unsigned long data)
|
