media: Staging: media: omap4iss: Use WARN_ON() instead of BUG_ON()

Use WARN_ON() instead of BUG_ON() to avoid crashing the kernel.

Signed-off-by: Srishti Sharma <srishtishar@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/omap4iss/iss.c

@@ -893,7 +893,7 @@ void omap4iss_put(struct iss_device *iss)
 		return;
 
 	mutex_lock(&iss->iss_mutex);
-	BUG_ON(iss->ref_count == 0);
+	WARN_ON(iss->ref_count == 0);
 	if (--iss->ref_count == 0) {
 		iss_disable_interrupts(iss);
 		/* Reset the ISS if an entity has failed to stop. This is the