2 files changed, 24 insertions, 19 deletions

diff --git a/drivers/firmware/imx/imx-scu-irq.c b/drivers/firmware/imx/imx-scu-irq.c
index 6125cccc9ba7..a68d38f89254 100644
--- a/drivers/firmware/imx/imx-scu-irq.c
+++ b/drivers/firmware/imx/imx-scu-irq.c
@@ -203,6 +203,18 @@ int imx_scu_enable_general_irq_channel(struct device *dev)
 	struct mbox_chan *ch;
 	int ret = 0, i = 0;
 
+	if (!of_parse_phandle_with_args(dev->of_node, "mboxes",
+				       "#mbox-cells", 0, &spec)) {
+		i = of_alias_get_id(spec.np, "mu");
+		of_node_put(spec.np);
+	}
+
+	/* use mu1 as general mu irq channel if failed */
+	if (i < 0)
+		i = 1;
+
+	mu_resource_id = IMX_SC_R_MU_0A + i;
+
 	ret = imx_scu_get_handle(&imx_sc_irq_ipc_handle);
 	if (ret)
 		return ret;
@@ -214,27 +226,16 @@ int imx_scu_enable_general_irq_channel(struct device *dev)
 	cl->dev = dev;
 	cl->rx_callback = imx_scu_irq_callback;
 
+	INIT_WORK(&imx_sc_irq_work, imx_scu_irq_work_handler);
+
 	/* SCU general IRQ uses general interrupt channel 3 */
 	ch = mbox_request_channel_byname(cl, "gip3");
 	if (IS_ERR(ch)) {
 		ret = PTR_ERR(ch);
 		dev_err(dev, "failed to request mbox chan gip3, ret %d\n", ret);
-		devm_kfree(dev, cl);
-		return ret;
+		goto free_cl;
 	}
 
-	INIT_WORK(&imx_sc_irq_work, imx_scu_irq_work_handler);
-
-	if (!of_parse_phandle_with_args(dev->of_node, "mboxes",
-				       "#mbox-cells", 0, &spec))
-		i = of_alias_get_id(spec.np, "mu");
-
-	/* use mu1 as general mu irq channel if failed */
-	if (i < 0)
-		i = 1;
-
-	mu_resource_id = IMX_SC_R_MU_0A + i;
-
 	/* Create directory under /sysfs/firmware */
 	wakeup_obj = kobject_create_and_add("scu_wakeup_source", firmware_kobj);
 	if (!wakeup_obj) {
@@ -253,7 +254,8 @@ int imx_scu_enable_general_irq_channel(struct device *dev)
 
 free_ch:
 	mbox_free_channel(ch);
+free_cl:
+	devm_kfree(dev, cl);
 
 	return ret;
 }
-EXPORT_SYMBOL(imx_scu_enable_general_irq_channel);
diff --git a/drivers/firmware/imx/imx-scu.c b/drivers/firmware/imx/imx-scu.c
index 8c28e25ddc8a..67b267a7408a 100644
--- a/drivers/firmware/imx/imx-scu.c
+++ b/drivers/firmware/imx/imx-scu.c
@@ -73,9 +73,9 @@ static int imx_sc_linux_errmap[IMX_SC_ERR_LAST] = {
 	-EACCES, /* IMX_SC_ERR_NOACCESS */
 	-EACCES, /* IMX_SC_ERR_LOCKED */
 	-ERANGE, /* IMX_SC_ERR_UNAVAILABLE */
-	-EEXIST, /* IMX_SC_ERR_NOTFOUND */
-	-EPERM,	 /* IMX_SC_ERR_NOPOWER */
-	-EPIPE,	 /* IMX_SC_ERR_IPC */
+	-ENOENT, /* IMX_SC_ERR_NOTFOUND */
+	-ENODEV, /* IMX_SC_ERR_NOPOWER */
+	-ECOMM,	 /* IMX_SC_ERR_IPC */
 	-EBUSY,	 /* IMX_SC_ERR_BUSY */
 	-EIO,	 /* IMX_SC_ERR_FAIL */
 };
@@ -324,7 +324,9 @@ static int imx_scu_probe(struct platform_device *pdev)
 	}
 
 	sc_ipc->dev = dev;
-	mutex_init(&sc_ipc->lock);
+	ret = devm_mutex_init(dev, &sc_ipc->lock);
+	if (ret)
+		return ret;
 	init_completion(&sc_ipc->done);
 
 	imx_sc_ipc_handle = sc_ipc;
@@ -352,6 +354,7 @@ static struct platform_driver imx_scu_driver = {
 	.driver = {
 		.name = "imx-scu",
 		.of_match_table = imx_scu_match,
+		.suppress_bind_attrs = true,
 	},
 	.probe = imx_scu_probe,
 };