brcm2708: update to latest patches from RPi foundation

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0745-staging-bcm2835-codec-Fix-imbalance-in-dma_buf_get-d.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0745-staging-bcm2835-codec-Fix-imbalance-in-dma_buf_get-d.patch b/target/linux/brcm2708/patches-4.19/950-0745-staging-bcm2835-codec-Fix-imbalance-in-dma_buf_get-d.patch
new file mode 100644 (file)
index 0000000..20550d4
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0745-staging-bcm2835-codec-Fix-imbalance-in-dma_buf_get-d.patch
@@ -0,0 +1,30 @@
+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;