diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 3e0d975ec94c..1d1f5d25d773 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -2782,6 +2782,7 @@ static int scmi_chan_setup(struct scmi_info *info, struct device_node *of_node,
 
 	cinfo->id = prot_id;
 	cinfo->dev = &tdev->dev;
+	cinfo->handle = &info->handle;
 	ret = info->desc->ops->chan_setup(cinfo, info->dev, tx);
 	if (ret) {
 		of_node_put(of_node);
@@ -2814,7 +2815,6 @@ static int scmi_chan_setup(struct scmi_info *info, struct device_node *of_node,
 		return ret;
 	}
 
-	cinfo->handle = &info->handle;
 	return 0;
 }
 
diff --git a/drivers/firmware/arm_scmi/transports/mailbox.c b/drivers/firmware/arm_scmi/transports/mailbox.c
index ae0f67e6cc45..b6459fbb8151 100644
--- a/drivers/firmware/arm_scmi/transports/mailbox.c
+++ b/drivers/firmware/arm_scmi/transports/mailbox.c
@@ -211,13 +211,18 @@ static int mailbox_chan_setup(struct scmi_chan_info *cinfo, struct device *dev,
 	cl->tx_block = false;
 	cl->knows_txdone = tx;
 
+	cinfo->transport_info = smbox;
+	smbox->cinfo = cinfo;
+	mutex_init(&smbox->chan_lock);
+
 	smbox->chan = mbox_request_channel(cl, tx ? 0 : p2a_chan);
 	if (IS_ERR(smbox->chan)) {
 		ret = PTR_ERR(smbox->chan);
+		smbox->chan = NULL;
 		if (ret != -EPROBE_DEFER)
 			dev_err(cdev,
 				"failed to request SCMI %s mailbox\n", desc);
-		return ret;
+		goto err_clear_cinfo;
 	}
 
 	/* Additional unidirectional channel for TX if needed */
@@ -241,11 +246,14 @@ static int mailbox_chan_setup(struct scmi_chan_info *cinfo, struct device *dev,
 		}
 	}
 
-	cinfo->transport_info = smbox;
-	smbox->cinfo = cinfo;
-	mutex_init(&smbox->chan_lock);
-
 	return 0;
+
+err_clear_cinfo:
+	cinfo->transport_info = NULL;
+	smbox->cinfo = NULL;
+	devm_iounmap(dev, smbox->shmem);
+	devm_kfree(dev, smbox);
+	return ret;
 }
 
 static int mailbox_chan_free(int id, void *p, void *data)
diff --git a/drivers/firmware/arm_scmi/transports/smc.c b/drivers/firmware/arm_scmi/transports/smc.c
index 21abb571e4f2..1fce3ccdeb7f 100644
--- a/drivers/firmware/arm_scmi/transports/smc.c
+++ b/drivers/firmware/arm_scmi/transports/smc.c
@@ -172,6 +172,13 @@ static int smc_chan_setup(struct scmi_chan_info *cinfo, struct device *dev,
 		scmi_info->param_page = SHMEM_PAGE(res.start);
 		scmi_info->param_offset = SHMEM_OFFSET(res.start);
 	}
+
+	scmi_info->func_id = func_id;
+	scmi_info->cap_id = cap_id;
+	scmi_info->cinfo = cinfo;
+	smc_channel_lock_init(scmi_info);
+	cinfo->transport_info = scmi_info;
+
 	/*
 	 * If there is an interrupt named "a2p", then the service and
 	 * completion of a message is signaled by an interrupt rather than by
@@ -183,18 +190,14 @@ static int smc_chan_setup(struct scmi_chan_info *cinfo, struct device *dev,
 				  IRQF_NO_SUSPEND, dev_name(dev), scmi_info);
 		if (ret) {
 			dev_err(dev, "failed to setup SCMI smc irq\n");
+			cinfo->transport_info = NULL;
+			scmi_info->cinfo = NULL;
 			return ret;
 		}
 	} else {
 		cinfo->no_completion_irq = true;
 	}
 
-	scmi_info->func_id = func_id;
-	scmi_info->cap_id = cap_id;
-	scmi_info->cinfo = cinfo;
-	smc_channel_lock_init(scmi_info);
-	cinfo->transport_info = scmi_info;
-
 	return 0;
 }