[PATCH] udmabuf: put dmabuf in case of get fd failed

[Xianting Tian]

It needs call dma_buf_put() to put dmabuf in case of getting
fd failed.

Signed-off-by: Xianting Tian <xianting.t...@linux.alibaba.com>
---
 drivers/dma-buf/udmabuf.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index c57a609db..d77f96995 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -274,8 +274,11 @@ static long udmabuf_create(struct miscdevice *device,
        flags = 0;
        if (head->flags & UDMABUF_FLAGS_CLOEXEC)
                flags |= O_CLOEXEC;
-       return dma_buf_fd(buf, flags);
+       ret = dma_buf_fd(buf, flags);
+       if (ret < 0) {
+               dma_buf_put(buf);
 
+       return ret;
 err:
        while (pgbuf > 0)
                put_page(ubuf->pages[--pgbuf]);
-- 
2.17.1