diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index f5f916d67905..8c8ddbf995a4 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -617,7 +617,7 @@ static int imx_rproc_prepare(struct rproc *rproc)
 
 		err = of_reserved_mem_region_to_resource(np, i++, &res);
 		if (err)
-			return 0;
+			break;
 
 		/*
 		 * Ignore the first memory region which will be used vdev buffer.
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 4651311aeb07..bb6f6a16d895 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -1592,12 +1592,51 @@ static const struct of_device_id mtk_scp_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
 
+static int __maybe_unused scp_suspend(struct device *dev)
+{
+	struct mtk_scp *scp = dev_get_drvdata(dev);
+	struct rproc *rproc = scp->rproc;
+
+	/*
+	 * Only unprepare if the SCP is running and holding the clock.
+	 *
+	 * Note: `scp_ops` doesn't implement .attach() callback, hence
+	 * `rproc->state` can never be RPROC_ATTACHED.  Otherwise, it
+	 * should also be checked here.
+	 */
+	if (rproc->state == RPROC_RUNNING)
+		clk_unprepare(scp->clk);
+	return 0;
+}
+
+static int __maybe_unused scp_resume(struct device *dev)
+{
+	struct mtk_scp *scp = dev_get_drvdata(dev);
+	struct rproc *rproc = scp->rproc;
+
+	/*
+	 * Only prepare if the SCP was running and holding the clock.
+	 *
+	 * Note: `scp_ops` doesn't implement .attach() callback, hence
+	 * `rproc->state` can never be RPROC_ATTACHED.  Otherwise, it
+	 * should also be checked here.
+	 */
+	if (rproc->state == RPROC_RUNNING)
+		return clk_prepare(scp->clk);
+	return 0;
+}
+
+static const struct dev_pm_ops scp_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(scp_suspend, scp_resume)
+};
+
 static struct platform_driver mtk_scp_driver = {
 	.probe = scp_probe,
 	.remove = scp_remove,
 	.driver = {
 		.name = "mtk-scp",
 		.of_match_table = mtk_scp_of_match,
+		.pm = &scp_pm_ops,
 	},
 };
 
diff --git a/drivers/remoteproc/qcom_sysmon.c b/drivers/remoteproc/qcom_sysmon.c
index cf10e8ecfb8f..3ceec1fd6d99 100644
--- a/drivers/remoteproc/qcom_sysmon.c
+++ b/drivers/remoteproc/qcom_sysmon.c
@@ -203,7 +203,7 @@ static const struct qmi_elem_info ssctl_shutdown_resp_ei[] = {
 };
 
 struct ssctl_subsys_event_req {
-	u8 subsys_name_len;
+	u32 subsys_name_len;
 	char subsys_name[SSCTL_SUBSYS_NAME_LENGTH];
 	u32 event;
 	u8 evt_driven_valid;
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
index ee18bf2e8054..4add9037dbd5 100644
--- a/drivers/remoteproc/qcom_wcnss.c
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -537,7 +537,7 @@ static int wcnss_alloc_memory_region(struct qcom_wcnss *wcnss)
 
 	wcnss->mem_phys = wcnss->mem_reloc = res.start;
 	wcnss->mem_size = resource_size(&res);
-	wcnss->mem_region = devm_ioremap_resource_wc(wcnss->dev, &res);
+	wcnss->mem_region = devm_ioremap_wc(wcnss->dev, wcnss->mem_phys, wcnss->mem_size);
 	if (IS_ERR(wcnss->mem_region)) {
 		dev_err(wcnss->dev, "unable to map memory region: %pR\n", &res);
 		return PTR_ERR(wcnss->mem_region);