[media] cx25821: fix sparse warning

drivers/media/pci/cx25821/cx25821-video-upstream.c:334:25: warning: incorrect type in argument 2 (different address spaces)

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/media/pci/cx25821/cx25821-video-upstream.c b/drivers/media/pci/cx25821/cx25821-video-upstream.c
index 1f43be0b04c8..a664997e1958 100644
--- a/drivers/media/pci/cx25821/cx25821-video-upstream.c
+++ b/drivers/media/pci/cx25821/cx25821-video-upstream.c
@@ -330,8 +330,9 @@ int cx25821_write_frame(struct cx25821_channel *chan,
 
         if (frame_size - curpos < count)
                 count = frame_size - curpos;
-        memcpy((char *)out->_data_buf_virt_addr + frame_offset + curpos,
-                        data, count);
+        if (copy_from_user((__force char *)out->_data_buf_virt_addr + frame_offset + curpos,
+                                data, count))
+                return -EFAULT;
         curpos += count;
         if (curpos == frame_size) {
                 out->_frame_count++;