linux-kernel - [PATCH] udmabuf: set read/write flag when exporting

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Date:   Wed, 14 Nov 2018 13:20:29 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     gurchetansingh@...omium.org, Gerd Hoffmann <kraxel@...hat.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-media@...r.kernel.org (open list:DMA BUFFER SHARING FRAMEWORK),
        linaro-mm-sig@...ts.linaro.org (moderated list:DMA BUFFER SHARING
        FRAMEWORK), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] udmabuf: set read/write flag when exporting

Otherwise, mmap fails when done with PROT_WRITE.

Suggested-by: Gurchetan Singh <gurchetansingh@...omium.org>
Signed-off-by: Gerd Hoffmann <kraxel@...hat.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 e70328ab7e..d9ff246093 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -189,6 +189,7 @@ 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)) {
-- 
2.9.3