media: cec: clear all cec_log_addrs fields

The CEC version, vendor ID and OSD name were not cleared when clearing the
current set of logical addresses. This was unexpected and somewhat confusing,
so reset all these fields to their default values. Also document this since
the documentation wasn't quite clear either.

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

Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst

@@ -48,7 +48,9 @@ can only be called by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`
 the ``EBUSY`` error code will be returned.
 
 To clear existing logical addresses set ``num_log_addrs`` to 0. All other fields
-will be ignored in that case. The adapter will go to the unconfigured state.
+will be ignored in that case. The adapter will go to the unconfigured state and the
+``cec_version``, ``vendor_id`` and ``osd_name`` fields are all reset to their default
+values (CEC version 2.0, no vendor ID and an empty OSD name).
 
 If the physical address is valid (see :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`),
 then this ioctl will block until all requested logical

drivers/media/cec/cec-adap.c

@@ -1471,8 +1471,13 @@ int __cec_s_log_addrs(struct cec_adapter *adap,
 		return -ENODEV;
 
 	if (!log_addrs || log_addrs->num_log_addrs == 0) {
-		adap->log_addrs.num_log_addrs = 0;
 		cec_adap_unconfigure(adap);
+		adap->log_addrs.num_log_addrs = 0;
+		for (i = 0; i < CEC_MAX_LOG_ADDRS; i++)
+			adap->log_addrs.log_addr[i] = CEC_LOG_ADDR_INVALID;
+		adap->log_addrs.osd_name[0] = '\0';
+		adap->log_addrs.vendor_id = CEC_VENDOR_ID_NONE;
+		adap->log_addrs.cec_version = CEC_OP_CEC_VERSION_2_0;
 		return 0;
 	}