diff --git a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-log-addrs.rst b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-log-addrs.rst
index f3293a589dd6..8397bf573798 100644
--- a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-log-addrs.rst
+++ b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-log-addrs.rst
@@ -185,6 +185,13 @@ logical address types are already defined will return with error ``EBUSY``.
 	are CEC devices that can only handle CDC messages.
 
 	All other messages are ignored.
+    * .. _`CEC-LOG-ADDRS-FL-CONFIG-FAILED`:
+
+      - ``CEC_LOG_ADDRS_FL_CONFIG_FAILED``
+      - 8
+      - If this flag is set, then the CEC device failed to claim a free logical
+        address and is in the unconfigured state. This can never happen if
+	``CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK`` was set as well.
 
 .. tabularcolumns:: |p{7.8cm}|p{1.0cm}|p{8.5cm}|
 
diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c
index 4d14186bfef6..774bf9099183 100644
--- a/drivers/media/cec/core/cec-adap.c
+++ b/drivers/media/cec/core/cec-adap.c
@@ -1482,6 +1482,7 @@ static int cec_config_thread_func(void *arg)
 	dprintk(1, "physical address: %x.%x.%x.%x, claim %d logical addresses\n",
 		cec_phys_addr_exp(adap->phys_addr), las->num_log_addrs);
 	las->log_addr_mask = 0;
+	las->flags &= ~CEC_LOG_ADDRS_FL_CONFIG_FAILED;
 
 	if (las->log_addr_type[0] == CEC_LOG_ADDR_TYPE_UNREGISTERED)
 		goto configured;
@@ -1614,6 +1615,8 @@ static int cec_config_thread_func(void *arg)
 unconfigure:
 	for (i = 0; i < las->num_log_addrs; i++)
 		las->log_addr[i] = CEC_LOG_ADDR_INVALID;
+	if (adap->phys_addr != CEC_PHYS_ADDR_INVALID)
+		las->flags |= CEC_LOG_ADDRS_FL_CONFIG_FAILED;
 	cec_adap_unconfigure(adap);
 	adap->is_configuring = false;
 	adap->must_reconfigure = false;
diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h
index 81a05c9c0706..fdfc97a6e4ec 100644
--- a/include/uapi/linux/cec.h
+++ b/include/uapi/linux/cec.h
@@ -403,6 +403,8 @@ struct cec_log_addrs {
 #define CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU	(1 << 1)
 /* CDC-Only device: supports only CDC messages */
 #define CEC_LOG_ADDRS_FL_CDC_ONLY		(1 << 2)
+/* Configuration failed */
+#define CEC_LOG_ADDRS_FL_CONFIG_FAILED		(1 << 3)
 
 /**
  * struct cec_drm_connector_info - tells which drm connector is