bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0326-staging-bcm2835-codec-Fix-imbalance-in-dma_buf_get-d.patch b/target/linux/bcm27xx/patches-5.4/950-0326-staging-bcm2835-codec-Fix-imbalance-in-dma_buf_get-d.patch
new file mode 100644
index 0000000000..f0fdfd29c8
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0326-staging-bcm2835-codec-Fix-imbalance-in-dma_buf_get-d.patch
@@ -0,0 +1,30 @@
+From 0c941589b9bfb07cd31c792b445e630817e956d1 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;