linux-kernel - [PATCH v2] dma-buf: align fd_flags and heap_flags with dma_heap_allocation

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Date: Wed,  5 Jun 2024 13:26:05 +1200
From: Barry Song <21cnbao@...il.com>
To: linaro-mm-sig@...ts.linaro.org,
	linux-media@...r.kernel.org,
	sumit.semwal@...aro.org
Cc: Brian.Starkey@....com,
	benjamin.gaignard@...labora.com,
	christian.koenig@....com,
	dri-devel@...ts.freedesktop.org,
	jstultz@...gle.com,
	linux-kernel@...r.kernel.org,
	tjmercier@...gle.com,
	v-songbaohua@...o.com,
	hailong.liu@...o.com
Subject: [PATCH v2] dma-buf: align fd_flags and heap_flags with dma_heap_allocation_data

From: Barry Song <v-songbaohua@...o.com>

dma_heap_allocation_data defines the UAPI as follows:

 struct dma_heap_allocation_data {
 	__u64 len;
 	__u32 fd;
 	__u32 fd_flags;
 	__u64 heap_flags;
 };

However, dma_heap_buffer_alloc() casts both fd_flags and heap_flags
into unsigned int. We're inconsistent with types in the non UAPI
arguments. This patch fixes it.

Signed-off-by: Barry Song <v-songbaohua@...o.com>
Acked-by: John Stultz <jstultz@...gle.com>
---
 -v2:
 collect ack of John, thanks!
 refine commit message;

 drivers/dma-buf/dma-heap.c    | 4 ++--
 include/uapi/linux/dma-heap.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index 84ae708fafe7..2298ca5e112e 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c
@@ -50,8 +50,8 @@ static struct class *dma_heap_class;
 static DEFINE_XARRAY_ALLOC(dma_heap_minors);
 
 static int dma_heap_buffer_alloc(struct dma_heap *heap, size_t len,
-				 unsigned int fd_flags,
-				 unsigned int heap_flags)
+				 u32 fd_flags,
+				 u64 heap_flags)
 {
 	struct dma_buf *dmabuf;
 	int fd;
diff --git a/include/uapi/linux/dma-heap.h b/include/uapi/linux/dma-heap.h
index 6f84fa08e074..a4cf716a49fa 100644
--- a/include/uapi/linux/dma-heap.h
+++ b/include/uapi/linux/dma-heap.h
@@ -19,7 +19,7 @@
 #define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE)
 
 /* Currently no heap flags */
-#define DMA_HEAP_VALID_HEAP_FLAGS (0)
+#define DMA_HEAP_VALID_HEAP_FLAGS (0ULL)
 
 /**
  * struct dma_heap_allocation_data - metadata passed from userspace for
-- 
2.34.1