media: cec: add adap_free op

This is needed for CEC adapters that allocate resources that have
to be freed before the cec_adapter is deleted.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/cec/cec-core.c

@@ -374,6 +374,8 @@ void cec_delete_adapter(struct cec_adapter *adap)
 	kthread_stop(adap->kthread);
 	if (adap->kthread_config)
 		kthread_stop(adap->kthread_config);
+	if (adap->ops->adap_free)
+		adap->ops->adap_free(adap);
 #ifdef CONFIG_MEDIA_CEC_RC
 	rc_free_device(adap->rc);
 #endif

include/media/cec.h

@@ -114,6 +114,7 @@ struct cec_adap_ops {
 	int (*adap_transmit)(struct cec_adapter *adap, u8 attempts,
 			     u32 signal_free_time, struct cec_msg *msg);
 	void (*adap_status)(struct cec_adapter *adap, struct seq_file *file);
+	void (*adap_free)(struct cec_adapter *adap);
 
 	/* High-level CEC message callback */
 	int (*received)(struct cec_adapter *adap, struct cec_msg *msg);