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authorGurchetan Singh <gurchetansingh@chromium.org>2019-12-03 02:36:25 +0100
committerGerd Hoffmann <kraxel@redhat.com>2019-12-05 08:57:45 +0100
commitc1bbed668997268c9edccdc9db1bd1487d9e20b0 (patch)
treeb6d261050cd2e4f2f8ac4092e1d399671bf196e3 /drivers/dma-buf/udmabuf.c
parentudmabuf: use cache_sgt_mapping option (diff)
downloadlinux-c1bbed668997268c9edccdc9db1bd1487d9e20b0.tar.xz
linux-c1bbed668997268c9edccdc9db1bd1487d9e20b0.zip
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: 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>
Diffstat (limited to 'drivers/dma-buf/udmabuf.c')
-rw-r--r--drivers/dma-buf/udmabuf.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index be15eb6b0586..f0bf3ba7441e 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -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;
}