media: ipu3-cio2: Return actual subdev format

Return actual subdev format on ipu3-cio2 subdev pads. The earlier
implementation was based on an infinite recursion that exhausted the
stack.

Reported-by: Tsuchiya Yuto <kitakar@gmail.com>
Fixes: c2a6a07afe4a ("media: intel-ipu3: cio2: add new MIPI-CSI2 driver")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Bingbu Cao <bingbu.cao@intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: stable@vger.kernel.org # v4.16 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.c b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
index 4e598e9..afa4720 100644 (file)
--- a/drivers/media/pci/intel/ipu3/ipu3-cio2.c
+++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
@@ -1232,29 +1232,11 @@ static int cio2_subdev_get_fmt(struct v4l2_subdev *sd,
                               struct v4l2_subdev_format *fmt)
 {
        struct cio2_queue *q = container_of(sd, struct cio2_queue, subdev);
-       struct v4l2_subdev_format format;
-       int ret;
 
-       if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+       if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
                fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
-               return 0;
-       }
-
-       if (fmt->pad == CIO2_PAD_SINK) {
-               format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
-               ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
-                                      &format);
-
-               if (ret)
-                       return ret;
-               /* update colorspace etc */
-               q->subdev_fmt.colorspace = format.format.colorspace;
-               q->subdev_fmt.ycbcr_enc = format.format.ycbcr_enc;
-               q->subdev_fmt.quantization = format.format.quantization;
-               q->subdev_fmt.xfer_func = format.format.xfer_func;
-       }
-
-       fmt->format = q->subdev_fmt;
+       else
+               fmt->format = q->subdev_fmt;
 
        return 0;
 }