bcm27xx: remove obsolete kernel 5.4

With the upgrade to kernel 5.10 per default the old version is no
longer required to be in tree.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 60 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0721-udmabuf-fix-dma-buf-cpu-access.patch b/target/linux/bcm27xx/patches-5.4/950-0721-udmabuf-fix-dma-buf-cpu-access.patch
deleted file mode 100644
index 14cfe8aed3..0000000000
--- a/target/linux/bcm27xx/patches-5.4/950-0721-udmabuf-fix-dma-buf-cpu-access.patch
+++ /dev/null
@@ -1,60 +0,0 @@
-From 153f1e1def226f87cc4c307d2806b000a820f64b Mon Sep 17 00:00:00 2001
-From: Gurchetan Singh <gurchetansingh@chromium.org>
-Date: Tue, 17 Dec 2019 15:02:28 -0800
-Subject: [PATCH] udmabuf: fix dma-buf cpu access
-
-Commit 1ffe09590121fbb3786d6c860acdd200f7ab095c upstream.
-
-I'm just going to put Chia's review comment here since it sums
-the issue rather nicely:
-
-"(1) Semantically, a dma-buf is in DMA domain.  CPU access from the
-importer must be surrounded by {begin,end}_cpu_access.  This gives the
-exporter a chance to move the buffer to the CPU domain temporarily.
-
-(2) When the exporter itself has other means to do CPU access, it is
-only reasonable for the exporter to move the buffer to the CPU domain
-before access, and to the DMA domain after access.  The exporter can
-potentially reuse {begin,end}_cpu_access for that purpose.
-
-Because of (1), udmabuf does need to implement the
-{begin,end}_cpu_access hooks.  But "begin" should mean
-dma_sync_sg_for_cpu and "end" should mean dma_sync_sg_for_device.
-
-Because of (2), if userspace wants to continuing accessing through the
-memfd mapping, it should call udmabuf's {begin,end}_cpu_access to
-avoid cache issues."
-
-Reported-by: Chia-I Wu <olvaffe@gmail.com>
-Suggested-by: Chia-I Wu <olvaffe@gmail.com>
-Fixes: 284562e1f348 ("udmabuf: implement begin_cpu_access/end_cpu_access hooks")
-Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
-Link: http://patchwork.freedesktop.org/patch/msgid/20191217230228.453-1-gurchetansingh@chromium.org
-Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
----
- drivers/dma-buf/udmabuf.c | 7 +++----
- 1 file changed, 3 insertions(+), 4 deletions(-)
-
---- a/drivers/dma-buf/udmabuf.c
-+++ b/drivers/dma-buf/udmabuf.c
-@@ -122,9 +122,8 @@ static int begin_cpu_udmabuf(struct dma_
- 		if (IS_ERR(ubuf->sg))
- 			return PTR_ERR(ubuf->sg);
- 	} else {
--		dma_sync_sg_for_device(dev, ubuf->sg->sgl,
--				       ubuf->sg->nents,
--				       direction);
-+		dma_sync_sg_for_cpu(dev, ubuf->sg->sgl, ubuf->sg->nents,
-+				    direction);
- 	}
- 
- 	return 0;
-@@ -139,7 +138,7 @@ static int end_cpu_udmabuf(struct dma_bu
- 	if (!ubuf->sg)
- 		return -EINVAL;
- 
--	dma_sync_sg_for_cpu(dev, ubuf->sg->sgl, ubuf->sg->nents, direction);
-+	dma_sync_sg_for_device(dev, ubuf->sg->sgl, ubuf->sg->nents, direction);
- 	return 0;
- }
-