[RFC 4/6] udmabuf: add a pointer to the miscdevice in dma-buf private data

[Gurchetan Singh]

Will be used later.

Signed-off-by: Gurchetan Singh <gurchetansingh at chromium.org>
---
 drivers/dma-buf/udmabuf.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index 134e53d24c2b..47003abbf4c2 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -19,6 +19,7 @@ struct udmabuf {
 	u32 flags;
 	pgoff_t pagecount;
 	struct page **pages;
+	struct miscdevice *udmabuf_misc;
 };
 
 static vm_fault_t udmabuf_vm_fault(struct vm_fault *vmf)
@@ -128,7 +129,8 @@ static const struct dma_buf_ops udmabuf_ops = {
 #define SEALS_WANTED (F_SEAL_SHRINK)
 #define SEALS_DENIED (F_SEAL_WRITE)
 
-static long udmabuf_create(const struct udmabuf_create_list *head,
+static long udmabuf_create(struct miscdevice *udmabuf_misc,
+			   struct udmabuf_create_list *head,
 			   const struct udmabuf_create_item *list)
 {
 	DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
@@ -202,6 +204,7 @@ static long udmabuf_create(const struct udmabuf_create_list *head,
 		exp_info.flags = O_WRONLY;
 
 	ubuf->flags = head->flags;
+	ubuf->udmabuf_misc = udmabuf_misc;
 	buf = dma_buf_export(&exp_info);
 	if (IS_ERR(buf)) {
 		ret = PTR_ERR(buf);
@@ -239,7 +242,7 @@ static long udmabuf_ioctl_create(struct file *filp, unsigned long arg)
 	list.offset = create.offset;
 	list.size   = create.size;
 
-	return udmabuf_create(&head, &list);
+	return udmabuf_create(filp->private_data, &head, &list);
 }
 
 static long udmabuf_ioctl_create_list(struct file *filp, unsigned long arg)
@@ -258,7 +261,7 @@ static long udmabuf_ioctl_create_list(struct file *filp, unsigned long arg)
 	if (IS_ERR(list))
 		return PTR_ERR(list);
 
-	ret = udmabuf_create(&head, list);
+	ret = udmabuf_create(filp->private_data, &head, list);
 	kfree(list);
 	return ret;
 }
-- 
2.17.1