redonkable/alistair23-linux
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udmabuf: add a pointer to the miscdevice in dma-buf private data

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Will be used later.

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

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20191203013627.85991-2-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gurchetan Singh 2019-12-02 17:36:25 -08:00 committed by Gerd Hoffmann
parent bc7a71da43
commit c1bbed6689
1 changed files with 7 additions and 4 deletions
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11
drivers/dma-buf/udmabuf.c
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@ -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;
}