From 5c074eeabbd332b11559f7fc1e89d456f94801fb Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Wed, 14 Nov 2018 13:20:29 +0100
Subject: [PATCH] udmabuf: set read/write flag when exporting
Otherwise, mmap fails when done with PROT_WRITE.
Suggested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20181114122029.16766-1-kraxel@redhat.com
---
drivers/dma-buf/udmabuf.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index 5b44ef226904..fc359ca4503d 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -184,6 +184,7 @@ static long udmabuf_create(const struct udmabuf_create_list *head,
exp_info.ops = &udmabuf_ops;
exp_info.size = ubuf->pagecount << PAGE_SHIFT;
exp_info.priv = ubuf;
+ exp_info.flags = O_RDWR;
buf = dma_buf_export(&exp_info);
if (IS_ERR(buf)) {