linux-kernel - [PATCH v2 06/13] staging/android: remove name arg from sync_file

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Date:	Thu, 28 Apr 2016 10:46:53 -0300
From:	Gustavo Padovan <gustavo@...ovan.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
	dri-devel@...ts.freedesktop.org,
	Daniel Stone <daniels@...labora.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Riley Andrews <riandrews@...roid.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Rob Clark <robdclark@...il.com>,
	Greg Hackmann <ghackmann@...gle.com>,
	John Harrison <John.C.Harrison@...el.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: [PATCH v2 06/13] staging/android: remove name arg from sync_file_create()

From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>

Simplifies the API to only receive the fence it needs to add to the
sync and create a name for the sync_file based on the fence context and
seqno.

Signed-off-by: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@...ll.ch>
---
 drivers/staging/android/sync.c       | 16 +++++++++-------
 drivers/staging/android/sync.h       |  2 +-
 drivers/staging/android/sync_debug.c |  3 +--
 3 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index 7e0fa20..5470ae9 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -136,7 +136,7 @@ struct fence *sync_pt_create(struct sync_timeline *obj, int size)
 }
 EXPORT_SYMBOL(sync_pt_create);
 
-static struct sync_file *sync_file_alloc(int size, const char *name)
+static struct sync_file *sync_file_alloc(int size)
 {
 	struct sync_file *sync_file;
 
@@ -150,7 +150,6 @@ static struct sync_file *sync_file_alloc(int size, const char *name)
 		goto err;
 
 	kref_init(&sync_file->kref);
-	strlcpy(sync_file->name, name, sizeof(sync_file->name));
 
 	init_waitqueue_head(&sync_file->wq);
 
@@ -175,23 +174,25 @@ static void fence_check_cb_func(struct fence *f, struct fence_cb *cb)
 
 /**
  * sync_fence_create() - creates a sync fence
- * @name:	name of fence to create
  * @fence:	fence to add to the sync_fence
  *
  * Creates a sync_file containg @fence. Once this is called, the sync_file
  * takes ownership of @fence.
  */
-struct sync_file *sync_file_create(const char *name, struct fence *fence)
+struct sync_file *sync_file_create(struct fence *fence)
 {
 	struct sync_file *sync_file;
 
-	sync_file = sync_file_alloc(offsetof(struct sync_file, cbs[1]),
-				    name);
+	sync_file = sync_file_alloc(offsetof(struct sync_file, cbs[1]));
 	if (!sync_file)
 		return NULL;
 
 	sync_file->num_fences = 1;
 	atomic_set(&sync_file->status, 1);
+	snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%d-%d",
+		 fence->ops->get_driver_name(fence),
+		 fence->ops->get_timeline_name(fence), fence->context,
+		 fence->seqno);
 
 	sync_file->cbs[0].fence = fence;
 	sync_file->cbs[0].sync_file = sync_file;
@@ -260,7 +261,7 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
 	int i, i_a, i_b;
 	unsigned long size = offsetof(struct sync_file, cbs[num_fences]);
 
-	sync_file = sync_file_alloc(size, name);
+	sync_file = sync_file_alloc(size);
 	if (!sync_file)
 		return NULL;
 
@@ -306,6 +307,7 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
 		atomic_sub(num_fences - i, &sync_file->status);
 	sync_file->num_fences = i;
 
+	strlcpy(sync_file->name, name, sizeof(sync_file->name));
 	sync_file_debug_add(sync_file);
 	return sync_file;
 }
diff --git a/drivers/staging/android/sync.h b/drivers/staging/android/sync.h
index 1f164df..7dee444 100644
--- a/drivers/staging/android/sync.h
+++ b/drivers/staging/android/sync.h
@@ -167,7 +167,7 @@ void sync_timeline_signal(struct sync_timeline *obj);
  */
 struct fence *sync_pt_create(struct sync_timeline *parent, int size);
 
-struct sync_file *sync_file_create(const char *name, struct fence *fence);
+struct sync_file *sync_file_create(struct fence *fence);
 
 #ifdef CONFIG_DEBUG_FS
 
diff --git a/drivers/staging/android/sync_debug.c b/drivers/staging/android/sync_debug.c
index e4b0e41..2cab40d 100644
--- a/drivers/staging/android/sync_debug.c
+++ b/drivers/staging/android/sync_debug.c
@@ -262,8 +262,7 @@ static long sw_sync_ioctl_create_fence(struct sw_sync_timeline *obj,
 		goto err;
 	}
 
-	data.name[sizeof(data.name) - 1] = '\0';
-	sync_file = sync_file_create(data.name, fence);
+	sync_file = sync_file_create(fence);
 	if (!sync_file) {
 		fence_put(fence);
 		err = -ENOMEM;
-- 
2.5.5