[media] em28xx: fix VIDIOC_DBG_G_CHIP_IDENT compliance errors

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index f025440bf953..b71df42aa7bb 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1403,6 +1403,14 @@ static int vidioc_g_chip_ident(struct file *file, void *priv,
 
         chip->ident = V4L2_IDENT_NONE;
         chip->revision = 0;
+        if (chip->match.type == V4L2_CHIP_MATCH_HOST) {
+                if (v4l2_chip_match_host(&chip->match))
+                        chip->ident = V4L2_IDENT_NONE;
+                return 0;
+        }
+        if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
+            chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
+                return -EINVAL;
 
         v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);