Patch "interconnect: fix error handling in qnoc_probe()" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    interconnect: fix error handling in qnoc_probe()

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     interconnect-fix-error-handling-in-qnoc_probe.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 42449301be5ea7ec290cf89efbf26589b384eec0
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date:   Thu Aug 3 21:05:21 2023 +0800

    interconnect: fix error handling in qnoc_probe()
    
    [ Upstream commit 273f74a2e7d15a5c216a4a26b84b1563c7092c9d ]
    
    Add missing clk_disable_unprepare() and clk_bulk_disable_unprepare()
    in the error path in qnoc_probe(). And when qcom_icc_qos_set() fails,
    it needs remove nodes and disable clks.
    
    Fixes: 2e2113c8a64f ("interconnect: qcom: rpm: Handle interface clocks")
    Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230803130521.959487-1-yangyingliang@xxxxxxxxxx
    Signed-off-by: Georgi Djakov <djakov@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c
index 2c16917ba1fda..e76356f91125f 100644
--- a/drivers/interconnect/qcom/icc-rpm.c
+++ b/drivers/interconnect/qcom/icc-rpm.c
@@ -497,7 +497,7 @@ int qnoc_probe(struct platform_device *pdev)
 
 	ret = devm_clk_bulk_get(dev, qp->num_intf_clks, qp->intf_clks);
 	if (ret)
-		return ret;
+		goto err_disable_unprepare_clk;
 
 	provider = &qp->provider;
 	provider->dev = dev;
@@ -512,13 +512,15 @@ int qnoc_probe(struct platform_device *pdev)
 	/* If this fails, bus accesses will crash the platform! */
 	ret = clk_bulk_prepare_enable(qp->num_intf_clks, qp->intf_clks);
 	if (ret)
-		return ret;
+		goto err_disable_unprepare_clk;
 
 	for (i = 0; i < num_nodes; i++) {
 		size_t j;
 
 		node = icc_node_create(qnodes[i]->id);
 		if (IS_ERR(node)) {
+			clk_bulk_disable_unprepare(qp->num_intf_clks,
+						   qp->intf_clks);
 			ret = PTR_ERR(node);
 			goto err_remove_nodes;
 		}
@@ -534,8 +536,11 @@ int qnoc_probe(struct platform_device *pdev)
 		if (qnodes[i]->qos.ap_owned &&
 		    qnodes[i]->qos.qos_mode != NOC_QOS_MODE_INVALID) {
 			ret = qcom_icc_qos_set(node);
-			if (ret)
-				return ret;
+			if (ret) {
+				clk_bulk_disable_unprepare(qp->num_intf_clks,
+							   qp->intf_clks);
+				goto err_remove_nodes;
+			}
 		}
 
 		data->nodes[i] = node;
@@ -563,6 +568,7 @@ int qnoc_probe(struct platform_device *pdev)
 	icc_provider_deregister(provider);
 err_remove_nodes:
 	icc_nodes_remove(provider);
+err_disable_unprepare_clk:
 	clk_disable_unprepare(qp->bus_clk);
 
 	return ret;