media: atomisp: Add target validation to atomisp_subdev_set_selection()

As the 2 comments in the function already say both the sink and the source
pads only support setting the selection for 1 target:

		/* Only crop target supported on sink pad. */
		/* Only compose target is supported on source pads. */

Validate that the passed in target actually matches these expectations.

Link: https://lore.kernel.org/r/20230529103741.11904-11-hdegoede@redhat.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/staging/media/atomisp/pci/atomisp_subdev.c b/drivers/staging/media/atomisp/pci/atomisp_subdev.c
index 7985a03..04e257e 100644 (file)
--- a/drivers/staging/media/atomisp/pci/atomisp_subdev.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_subdev.c
@@ -360,6 +360,10 @@ int atomisp_subdev_set_selection(struct v4l2_subdev *sd,
        unsigned int padding_w = pad_w;
        unsigned int padding_h = pad_h;
 
+       if ((pad == ATOMISP_SUBDEV_PAD_SINK && target != V4L2_SEL_TGT_CROP) ||
+           (pad == ATOMISP_SUBDEV_PAD_SOURCE && target != V4L2_SEL_TGT_COMPOSE))
+               return -EINVAL;
+
        isp_get_fmt_rect(sd, sd_state, which, ffmt, crop, comp);
 
        dev_dbg(isp->dev,