Add a common allocation helper. Cleaning up the mix of kzalloc/kmalloc
and some unused code in the selftest.
v2: polish kernel doc a bit
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/dma-buf/st-dma-fence-chain.c | 16 ++++---------
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 4 ++--
drivers/gpu/drm/drm_syncobj.c | 6 ++---
.../gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 ++---
drivers/gpu/drm/msm/msm_gem_submit.c | 6 ++---
include/linux/dma-fence-chain.h | 23 +++++++++++++++++++
6 files changed, 36 insertions(+), 25 deletions(-)
diff --git a/drivers/dma-buf/st-dma-fence-chain.c b/drivers/dma-buf/st-dma-fence-chain.c
index 9525f7f56119..8ce1ea59d31b 100644
--- a/drivers/dma-buf/st-dma-fence-chain.c
+++ b/drivers/dma-buf/st-dma-fence-chain.c
@@ -58,28 +58,20 @@ static struct dma_fence *mock_fence(void)
return &f->base;
}
-static inline struct mock_chain {
- struct dma_fence_chain base;
-} *to_mock_chain(struct dma_fence *f) {
- return container_of(f, struct mock_chain, base.base);
-}
-
static struct dma_fence *mock_chain(struct dma_fence *prev,
struct dma_fence *fence,
u64 seqno)
{
- struct mock_chain *f;
+ struct dma_fence_chain *f;
- f = kmalloc(sizeof(*f), GFP_KERNEL);
+ f = dma_fence_chain_alloc();
if (!f)
return NULL;
- dma_fence_chain_init(&f->base,
- dma_fence_get(prev),
- dma_fence_get(fence),
+ dma_fence_chain_init(f, dma_fence_get(prev), dma_fence_get(fence),
seqno);
- return &f->base.base;
+ return &f->base;
}
static int sanitycheck(void *arg)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 90136f9dedd6..325e82621467 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1124,7 +1124,7 @@ static int amdgpu_cs_process_syncobj_timeline_out_dep(struct amdgpu_cs_parser *p
dep->chain = NULL;
if (syncobj_deps[i].point) {
- dep->chain = kmalloc(sizeof(*dep->chain), GFP_KERNEL);
+ dep->chain = dma_fence_chain_alloc();
if (!dep->chain)
return -ENOMEM;
}
@@ -1132,7 +1132,7 @@ static int amdgpu_cs_process_syncobj_timeline_out_dep(struct amdgpu_cs_parser *p
dep->syncobj = drm_syncobj_find(p->filp,
syncobj_deps[i].handle);
if (!dep->syncobj) {
- kfree(dep->chain);
+ dma_fence_chain_free(dep->chain);
return -EINVAL;
}
dep->point = syncobj_deps[i].point;
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index fdd2ec87cdd1..1c5b9ef6da37 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -861,7 +861,7 @@ static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,
&fence);
if (ret)
goto err;
- chain = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);
+ chain = dma_fence_chain_alloc();
if (!chain) {
ret = -ENOMEM;
goto err1;
@@ -1402,10 +1402,10 @@ drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
goto err_points;
}
for (i = 0; i < args->count_handles; i++) {
- chains[i] = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);
+ chains[i] = dma_fence_chain_alloc();
if (!chains[i]) {
for (j = 0; j < i; j++)
- kfree(chains[j]);
+ dma_fence_chain_free(chains[j]);
ret = -ENOMEM;
goto err_chains;
}
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 66789111a24b..a22cb86730b3 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -2983,7 +2983,7 @@ __free_fence_array(struct eb_fence *fences, unsigned int n)
while (n--) {
drm_syncobj_put(ptr_mask_bits(fences[n].syncobj, 2));
dma_fence_put(fences[n].dma_fence);
- kfree(fences[n].chain_fence);
+ dma_fence_chain_free(fences[n].chain_fence);
}
kvfree(fences);
}
@@ -3097,9 +3097,7 @@ add_timeline_fence_array(struct i915_execbuffer *eb,
return -EINVAL;
}
- f->chain_fence =
- kmalloc(sizeof(*f->chain_fence),
- GFP_KERNEL);
+ f->chain_fence = dma_fence_chain_alloc();
if (!f->chain_fence) {
drm_syncobj_put(syncobj);
dma_fence_put(fence);
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 5480852bdeda..6ff6df6c4791 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -586,9 +586,7 @@ static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
break;
}
- post_deps[i].chain =
- kmalloc(sizeof(*post_deps[i].chain),
- GFP_KERNEL);
+ post_deps[i].chain = dma_fence_chain_alloc();
if (!post_deps[i].chain) {
ret = -ENOMEM;
break;
@@ -605,7 +603,7 @@ static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
if (ret) {
for (j = 0; j <= i; ++j) {
- kfree(post_deps[j].chain);
+ dma_fence_chain_free(post_deps[j].chain);
if (post_deps[j].syncobj)
drm_syncobj_put(post_deps[j].syncobj);
}
diff --git a/include/linux/dma-fence-chain.h b/include/linux/dma-fence-chain.h
index c6eb3aa45668..7ec36d850363 100644
--- a/include/linux/dma-fence-chain.h
+++ b/include/linux/dma-fence-chain.h
@@ -12,6 +12,7 @@
#include <linux/dma-fence.h>
#include <linux/irq_work.h>
+#include <linux/slab.h>
/**
* struct dma_fence_chain - fence to represent an node of a fence chain
@@ -66,6 +67,28 @@ to_dma_fence_chain(struct dma_fence *fence)
return container_of(fence, struct dma_fence_chain, base);
}
+/**
+ * dma_fence_chain_alloc
+ *
+ * Returns a new dma_fence_chain object or NULL on failure.
+ */
+static inline struct dma_fence_chain *dma_fence_chain_alloc(void)
+{
+ return kmalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);
+};
+
+/**
+ * dma_fence_chain_free
+ * @chain: chain node to free
+ *
+ * Frees up an allocated but not used dma_fence_chain node. This doesn't need
+ * an RCU grace period since the fence was never initialized nor published.
+ */
+static inline void dma_fence_chain_free(struct dma_fence_chain *chain)
+{
+ kfree(chain);
+};
+
/**
* dma_fence_chain_for_each - iterate over all fences in chain
* @iter: current fence
--
2.25.1
