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From 4542b5d7b4e00b11dd37d93986b624c58b198765 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Mon, 7 Oct 2019 14:02:57 +0100
Subject: [PATCH] staging: bcm2835-codec: Fix imbalance in
dma_buf_get/dma_buf_put
When represented with a dmabuf buffer that had previously been
imported, there was a call to dma_buf_get without a matching
dma_buf_put. This left dmabufs in limbo after all users had
supposedly released them.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
.../staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
+++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
@@ -2112,6 +2112,11 @@ static int bcm2835_codec_buf_prepare(str
}
buf->mmal.dma_buf = dma_buf;
+ } else {
+ /* We already have a reference count on the dmabuf, so
+ * release the one we acquired above.
+ */
+ dma_buf_put(dma_buf);
}
ret = 0;
break;
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