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authorSean Paul <seanpaul@chromium.org>2017-07-17 11:43:05 -0400
committerSean Paul <seanpaul@chromium.org>2017-07-17 11:56:07 -0400
commitef434a0c2ce765ad33026375db7d23aebd5e9532 (patch)
tree4bdac59f0bac3a6508741e6bd62da6e770fc3bc1 /drivers/dma-buf/sync_file.c
parent76250f2b743b72cb685cc51ac0cdabb32957180b (diff)
parent1ed134e6526b1b513a14fba938f6d96aa1c7f3dd (diff)
downloadlinux-ef434a0c2ce765ad33026375db7d23aebd5e9532.tar.bz2
Merge branch 'drm-misc-next-fixes' into drm-misc-fixes
Pick up 1ed134e6526b drm/vc4: Fix VBLANK handling in crtc->enable() path From drm-misc-next-fixes, it was applied after the last pull request was sent from that branch. We'll send it through drm-fixes instead.
Diffstat (limited to 'drivers/dma-buf/sync_file.c')
-rw-r--r--drivers/dma-buf/sync_file.c52
1 files changed, 34 insertions, 18 deletions
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
index 95f259b719fc..d7e219d2669d 100644
--- a/drivers/dma-buf/sync_file.c
+++ b/drivers/dma-buf/sync_file.c
@@ -41,8 +41,6 @@ static struct sync_file *sync_file_alloc(void)
if (IS_ERR(sync_file->file))
goto err;
- kref_init(&sync_file->kref);
-
init_waitqueue_head(&sync_file->wq);
INIT_LIST_HEAD(&sync_file->cb.node);
@@ -82,11 +80,6 @@ struct sync_file *sync_file_create(struct dma_fence *fence)
sync_file->fence = dma_fence_get(fence);
- snprintf(sync_file->name, sizeof(sync_file->name), "%s-%s%llu-%d",
- fence->ops->get_driver_name(fence),
- fence->ops->get_timeline_name(fence), fence->context,
- fence->seqno);
-
return sync_file;
}
EXPORT_SYMBOL(sync_file_create);
@@ -131,6 +124,36 @@ struct dma_fence *sync_file_get_fence(int fd)
}
EXPORT_SYMBOL(sync_file_get_fence);
+/**
+ * sync_file_get_name - get the name of the sync_file
+ * @sync_file: sync_file to get the fence from
+ * @buf: destination buffer to copy sync_file name into
+ * @len: available size of destination buffer.
+ *
+ * Each sync_file may have a name assigned either by the user (when merging
+ * sync_files together) or created from the fence it contains. In the latter
+ * case construction of the name is deferred until use, and so requires
+ * sync_file_get_name().
+ *
+ * Returns: a string representing the name.
+ */
+char *sync_file_get_name(struct sync_file *sync_file, char *buf, int len)
+{
+ if (sync_file->user_name[0]) {
+ strlcpy(buf, sync_file->user_name, len);
+ } else {
+ struct dma_fence *fence = sync_file->fence;
+
+ snprintf(buf, len, "%s-%s%llu-%d",
+ fence->ops->get_driver_name(fence),
+ fence->ops->get_timeline_name(fence),
+ fence->context,
+ fence->seqno);
+ }
+
+ return buf;
+}
+
static int sync_file_set_fence(struct sync_file *sync_file,
struct dma_fence **fences, int num_fences)
{
@@ -268,7 +291,7 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
goto err;
}
- strlcpy(sync_file->name, name, sizeof(sync_file->name));
+ strlcpy(sync_file->user_name, name, sizeof(sync_file->user_name));
return sync_file;
err:
@@ -277,22 +300,15 @@ err:
}
-static void sync_file_free(struct kref *kref)
+static int sync_file_release(struct inode *inode, struct file *file)
{
- struct sync_file *sync_file = container_of(kref, struct sync_file,
- kref);
+ struct sync_file *sync_file = file->private_data;
if (test_bit(POLL_ENABLED, &sync_file->fence->flags))
dma_fence_remove_callback(sync_file->fence, &sync_file->cb);
dma_fence_put(sync_file->fence);
kfree(sync_file);
-}
-
-static int sync_file_release(struct inode *inode, struct file *file)
-{
- struct sync_file *sync_file = file->private_data;
- kref_put(&sync_file->kref, sync_file_free);
return 0;
}
@@ -428,7 +444,7 @@ static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
}
no_fences:
- strlcpy(info.name, sync_file->name, sizeof(info.name));
+ sync_file_get_name(sync_file, info.name, sizeof(info.name));
info.status = dma_fence_is_signaled(sync_file->fence);
info.num_fences = num_fences;