1 files changed, 0 insertions, 90 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0720-udmabuf-implement-begin_cpu_access-end_cpu_access-ho.patch b/target/linux/bcm27xx/patches-5.4/950-0720-udmabuf-implement-begin_cpu_access-end_cpu_access-ho.patch
deleted file mode 100644
index 79f6a67387..0000000000
--- a/target/linux/bcm27xx/patches-5.4/950-0720-udmabuf-implement-begin_cpu_access-end_cpu_access-ho.patch
+++ /dev/null
@@ -1,90 +0,0 @@
-From 9dc454ebc4380cd90c24a3c224bb0ac7b3d9cc29 Mon Sep 17 00:00:00 2001
-From: Gurchetan Singh <gurchetansingh@chromium.org>
-Date: Mon, 2 Dec 2019 17:36:27 -0800
-Subject: [PATCH] udmabuf: implement begin_cpu_access/end_cpu_access
- hooks
-
-Commit 284562e1f34874e267d4f499362c3816f8f6bc3f upstream.
-
-With the misc device, we should end up using the result of
-get_arch_dma_ops(..) or dma-direct ops.
-
-This can allow us to have WC mappings in the guest after
-synchronization.
-
-Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
-Link: http://patchwork.freedesktop.org/patch/msgid/20191203013627.85991-4-gurchetansingh@chromium.org
-Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
----
- drivers/dma-buf/udmabuf.c | 39 +++++++++++++++++++++++++++++++++++++++
- 1 file changed, 39 insertions(+)
-
---- a/drivers/dma-buf/udmabuf.c
-+++ b/drivers/dma-buf/udmabuf.c
-@@ -18,6 +18,7 @@ static const size_t size_limit_mb = 64;
- struct udmabuf {
- 	pgoff_t pagecount;
- 	struct page **pages;
-+	struct sg_table *sg;
- 	struct miscdevice *device;
- };
- 
-@@ -98,20 +99,58 @@ static void unmap_udmabuf(struct dma_buf
- static void release_udmabuf(struct dma_buf *buf)
- {
- 	struct udmabuf *ubuf = buf->priv;
-+	struct device *dev = ubuf->device->this_device;
- 	pgoff_t pg;
- 
-+	if (ubuf->sg)
-+		put_sg_table(dev, ubuf->sg, DMA_BIDIRECTIONAL);
-+
- 	for (pg = 0; pg < ubuf->pagecount; pg++)
- 		put_page(ubuf->pages[pg]);
- 	kfree(ubuf->pages);
- 	kfree(ubuf);
- }
- 
-+static int begin_cpu_udmabuf(struct dma_buf *buf,
-+			     enum dma_data_direction direction)
-+{
-+	struct udmabuf *ubuf = buf->priv;
-+	struct device *dev = ubuf->device->this_device;
-+
-+	if (!ubuf->sg) {
-+		ubuf->sg = get_sg_table(dev, buf, direction);
-+		if (IS_ERR(ubuf->sg))
-+			return PTR_ERR(ubuf->sg);
-+	} else {
-+		dma_sync_sg_for_device(dev, ubuf->sg->sgl,
-+				       ubuf->sg->nents,
-+				       direction);
-+	}
-+
-+	return 0;
-+}
-+
-+static int end_cpu_udmabuf(struct dma_buf *buf,
-+			   enum dma_data_direction direction)
-+{
-+	struct udmabuf *ubuf = buf->priv;
-+	struct device *dev = ubuf->device->this_device;
-+
-+	if (!ubuf->sg)
-+		return -EINVAL;
-+
-+	dma_sync_sg_for_cpu(dev, ubuf->sg->sgl, ubuf->sg->nents, direction);
-+	return 0;
-+}
-+
- static const struct dma_buf_ops udmabuf_ops = {
- 	.cache_sgt_mapping = true,
- 	.map_dma_buf	   = map_udmabuf,
- 	.unmap_dma_buf	   = unmap_udmabuf,
- 	.release	   = release_udmabuf,
- 	.mmap		   = mmap_udmabuf,
-+	.begin_cpu_access  = begin_cpu_udmabuf,
-+	.end_cpu_access    = end_cpu_udmabuf,
- };
- 
- #define SEALS_WANTED (F_SEAL_SHRINK)