Commit c1bbed66 authored by Gurchetan Singh's avatar Gurchetan Singh Committed by Gerd Hoffmann
Browse files

udmabuf: add a pointer to the miscdevice in dma-buf private data 



Will be used later.

v2: rename 'udmabuf_misc' to 'device' (kraxel)

Signed-off-by: default avatarGurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20191203013627.85991-2-gurchetansingh@chromium.org


Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent bc7a71da

drivers/dma-buf/udmabuf.c

+7 −4
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ static const size_t size_limit_mb = 64; /* total dmabuf size, in megabytes */ 
struct udmabuf {

	pgoff_t pagecount;

	struct page **pages;

	struct miscdevice *device;

};



static vm_fault_t udmabuf_vm_fault(struct vm_fault *vmf)
@@ -104,8 +105,9 @@ 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,

			   const struct udmabuf_create_item *list)

static long udmabuf_create(struct miscdevice *device,

			   struct udmabuf_create_list *head,

			   struct udmabuf_create_item *list)

{

	DEFINE_DMA_BUF_EXPORT_INFO(exp_info);

	struct file *memfd = NULL;
@@ -172,6 +174,7 @@ static long udmabuf_create(const struct udmabuf_create_list *head, 
	exp_info.priv = ubuf;

	exp_info.flags = O_RDWR;



	ubuf->device = device;

	buf = dma_buf_export(&exp_info);

	if (IS_ERR(buf)) {

		ret = PTR_ERR(buf);
@@ -209,7 +212,7 @@ 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)
@@ -228,7 +231,7 @@ 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;

}