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Subject[PATCH 57/62] drm: Remove drm_syncobj_fd_to_handle
Date
From: Matthew Wilcox <mawilcox@microsoft.com>

Now that the IDR handles its own locking, by removing our own lock, we
can also remove the idr_preload calls.

Also add a missing put call in a failure path.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
---
drivers/gpu/drm/drm_syncobj.c | 23 +++++------------------
include/drm/drm_file.h | 2 --
2 files changed, 5 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index f776fc1cc543..fec56b26a0b6 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -68,14 +68,14 @@ struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
{
struct drm_syncobj *syncobj;

- spin_lock(&file_private->syncobj_table_lock);
+ idr_lock(&file_private->syncobj_idr);

/* Check if we currently have a reference on the object */
syncobj = idr_find(&file_private->syncobj_idr, handle);
if (syncobj)
drm_syncobj_get(syncobj);

- spin_unlock(&file_private->syncobj_table_lock);
+ idr_unlock(&file_private->syncobj_idr);

return syncobj;
}
@@ -309,13 +309,7 @@ int drm_syncobj_get_handle(struct drm_file *file_private,
/* take a reference to put in the idr */
drm_syncobj_get(syncobj);

- idr_preload(GFP_KERNEL);
- spin_lock(&file_private->syncobj_table_lock);
- ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT);
- spin_unlock(&file_private->syncobj_table_lock);
-
- idr_preload_end();
-
+ ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_KERNEL);
if (ret < 0) {
drm_syncobj_put(syncobj);
return ret;
@@ -346,9 +340,7 @@ static int drm_syncobj_destroy(struct drm_file *file_private,
{
struct drm_syncobj *syncobj;

- spin_lock(&file_private->syncobj_table_lock);
syncobj = idr_remove(&file_private->syncobj_idr, handle);
- spin_unlock(&file_private->syncobj_table_lock);

if (!syncobj)
return -EINVAL;
@@ -449,14 +441,10 @@ static int drm_syncobj_fd_to_handle(struct drm_file *file_private,
/* take a reference to put in the idr */
drm_syncobj_get(syncobj);

- idr_preload(GFP_KERNEL);
- spin_lock(&file_private->syncobj_table_lock);
- ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT);
- spin_unlock(&file_private->syncobj_table_lock);
- idr_preload_end();
-
+ ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_KERNEL);
if (ret < 0) {
fput(syncobj->file);
+ drm_syncobj_put(syncobj);
return ret;
}
*handle = ret;
@@ -527,7 +515,6 @@ void
drm_syncobj_open(struct drm_file *file_private)
{
idr_init(&file_private->syncobj_idr);
- spin_lock_init(&file_private->syncobj_table_lock);
}

static int
diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h
index dd3520d8ce60..dfabc20a5934 100644
--- a/include/drm/drm_file.h
+++ b/include/drm/drm_file.h
@@ -231,8 +231,6 @@ struct drm_file {

/** @syncobj_idr: Mapping of sync object handles to object pointers. */
struct idr syncobj_idr;
- /** @syncobj_table_lock: Protects @syncobj_idr. */
- spinlock_t syncobj_table_lock;

/** @filp: Pointer to the core file structure. */
struct file *filp;
--
2.15.0
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