From: Gerd Hoffmann <kraxel@redhat.com>
Date: Wed, 14 Nov 2018 12:20:29 +0000 (+0100)
Subject: udmabuf: set read/write flag when exporting
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5c074eeabbd332b11559f7fc1e89d456f94801fb;p=linux.git

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
---

diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index 5b44ef226904f..fc359ca4503d1 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)) {