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

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Date:   Mon, 20 Dec 2021 13:43:33 +0800
From:   Xianting Tian <xianting.tian@...ux.alibaba.com>
To:     kraxel@...hat.com, sumit.semwal@...aro.org,
        christian.koenig@....com
Cc:     dri-devel@...ts.freedesktop.org, linux-media@...r.kernel.org,
        linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org,
        Xianting Tian <xianting.tian@...ux.alibaba.com>
Subject: [PATCH] udmabuf: put dmabuf in case of get fd failed

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

Signed-off-by: Xianting Tian <xianting.tian@...ux.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