If an uninitialised v4l2_subdev struct was passed to
media_entity_create_link(), one of the BUG_ON()'s in the function will be
hit since media_entity.num_pads will be zero. Avoid this by checking whether
the num_pads field is non-zero for the interface.
Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
---
drivers/media/platform/omap3isp/isp.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/media/platform/omap3isp/isp.c
b/drivers/media/platform/omap3isp/isp.c
index fb193b6..4ab674d 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -1946,6 +1946,19 @@ static int isp_register_entities(struct isp_device *isp)
goto done;
}
+ /*
+ * Not all interfaces are available on all revisions
+ * of the ISP. The sub-devices of those interfaces
+ * aren't initialised in such a case. Check this by
+ * ensuring the num_pads is non-zero.
+ */
+ if (!input->num_pads) {
+ dev_err(isp->dev, "%s: invalid input %u\n",
+ entity->name, subdevs->interface);
+ ret = -EINVAL;
+ goto done;
+ }
+
for (i = 0; i < sensor->entity.num_pads; i++) {
if (sensor->entity.pads[i].flags & MEDIA_PAD_FL_SOURCE)
break;
--
1.7.10.4
--
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