[PATCH] dma-buf: fix reference count leak in dma_buf_poll_add_cb()

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To: Christian König <christian.koenig@xxxxxxx>
Subject: [PATCH] dma-buf: fix reference count leak in dma_buf_poll_add_cb()
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Tue, 23 Sep 2025 14:14:41 +0300
Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>, Simona Vetter <simona.vetter@xxxxxxxx>, linux-media@xxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, linaro-mm-sig@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, kernel-janitors@xxxxxxxxxxxxxxx

Call dma_fence_put(fence) if dma_fence_add_callback() fails.

Fixes: 6b51b02a3a0a ("dma-buf: fix and rework dma_buf_poll v7")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
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