dma-buf: remove dma_buf_debugfs_create_file()

There is only a single user of dma_buf_debugfs_create_file() and that
one got the function pointer cast wrong. With that one fixed, there is
no need to have a wrapper for debugfs_create_file(), just call it
directly.

With no users left, we can remove dma_buf_debugfs_create_file().

While at it, simplify the error handling in dma_buf_init_debugfs()
slightly.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1466339491-12639-2-git-send-email-minipli@googlemail.com

2 files changed, 9 insertions, 22 deletions

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index f03e51561199..20ce0687b111 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -895,22 +895,22 @@ static struct dentry *dma_buf_debugfs_dir;
 
 static int dma_buf_init_debugfs(void)
 {
+        struct dentry *d;
         int err = 0;
 
-        dma_buf_debugfs_dir = debugfs_create_dir("dma_buf", NULL);
+        d = debugfs_create_dir("dma_buf", NULL);
+        if (IS_ERR(d))
+                return PTR_ERR(d);
 
-        if (IS_ERR(dma_buf_debugfs_dir)) {
-                err = PTR_ERR(dma_buf_debugfs_dir);
-                dma_buf_debugfs_dir = NULL;
-                return err;
-        }
+        dma_buf_debugfs_dir = d;
 
-        err = dma_buf_debugfs_create_file("bufinfo", NULL);
-
-        if (err) {
+        d = debugfs_create_file("bufinfo", S_IRUGO, dma_buf_debugfs_dir,
+                                NULL, &dma_buf_debug_fops);
+        if (IS_ERR(d)) {
                 pr_debug("dma_buf: debugfs: failed to create node bufinfo\n");
                 debugfs_remove_recursive(dma_buf_debugfs_dir);
                 dma_buf_debugfs_dir = NULL;
+                err = PTR_ERR(d);
         }
 
         return err;
@@ -921,17 +921,6 @@ static void dma_buf_uninit_debugfs(void)
         if (dma_buf_debugfs_dir)
                 debugfs_remove_recursive(dma_buf_debugfs_dir);
 }
-
-int dma_buf_debugfs_create_file(const char *name,
-                                int (*write)(struct seq_file *))
-{
-        struct dentry *d;
-
-        d = debugfs_create_file(name, S_IRUGO, dma_buf_debugfs_dir,
-                        write, &dma_buf_debug_fops);
-
-        return PTR_ERR_OR_ZERO(d);
-}
 #else
 static inline int dma_buf_init_debugfs(void)
 {
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 4551c6f2a6c4..e0b0741ae671 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -242,6 +242,4 @@ int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *,
                  unsigned long);
 void *dma_buf_vmap(struct dma_buf *);
 void dma_buf_vunmap(struct dma_buf *, void *vaddr);
-int dma_buf_debugfs_create_file(const char *name,
-                                int (*write)(struct seq_file *));
 #endif /* __DMA_BUF_H__ */