[media] V4L: sh-mobile-ceu-camera: fix mixed CSI2 & parallel camera case

The current sh_mobile_ceu_camera driver can cause an Oops, if a CSI2 and a
parallel camera are registered on the same CEU. Fix it by making CSI2
association with a camera more targeted.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index 59101c0be869..5c8ddd821df6 100644
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -717,10 +717,13 @@ static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
 static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
                                            struct soc_camera_device *icd)
 {
-        if (!pcdev->csi2_pdev)
-                return soc_camera_to_subdev(icd);
+        if (pcdev->csi2_pdev) {
+                struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
+                if (csi2_sd && csi2_sd->grp_id == (u32)icd)
+                        return csi2_sd;
+        }
 
-        return find_csi2(pcdev);
+        return soc_camera_to_subdev(icd);
 }
 
 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER |       \