linux-kernel - [PATCH] clk: qcom: ipq8074: fix PCI-E clock oops

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Date:   Tue, 18 May 2021 19:51:53 +0200
From:   Robert Marko <robimarko@...il.com>
To:     agross@...nel.org, bjorn.andersson@...aro.org,
        mturquette@...libre.com, sboyd@...nel.org, speriaka@...eaurora.org,
        sivaprak@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Robert Marko <robimarko@...il.com>
Subject: [PATCH] clk: qcom: ipq8074: fix PCI-E clock oops

Fix PCI-E clock related kernel oops that are causes by missing
parent_names.

Without the use of parent_names kernel will panic on
clk_core_get_parent_by_index() due to a NULL pointer.

Without this earlycon is needed to even catch the OOPS as it will reset
the board before serial is initialized.

Fixes: f0cfcf1ade20 ("clk: qcom: ipq8074: Add missing clocks for pcie")
Signed-off-by: Robert Marko <robimarko@...il.com>
---
 drivers/clk/qcom/gcc-ipq8074.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/qcom/gcc-ipq8074.c b/drivers/clk/qcom/gcc-ipq8074.c
index 0c619ed35c82..8d8b1717a203 100644
--- a/drivers/clk/qcom/gcc-ipq8074.c
+++ b/drivers/clk/qcom/gcc-ipq8074.c
@@ -4357,8 +4357,7 @@ static struct clk_rcg2 pcie0_rchng_clk_src = {
 	.parent_map = gcc_xo_gpll0_map,
 	.clkr.hw.init = &(struct clk_init_data){
 		.name = "pcie0_rchng_clk_src",
-		.parent_hws = (const struct clk_hw *[]) {
-				&gpll0.clkr.hw },
+		.parent_names = gcc_xo_gpll0,
 		.num_parents = 2,
 		.ops = &clk_rcg2_ops,
 	},
@@ -4372,8 +4371,8 @@ static struct clk_branch gcc_pcie0_rchng_clk = {
 		.enable_mask = BIT(1),
 		.hw.init = &(struct clk_init_data){
 			.name = "gcc_pcie0_rchng_clk",
-			.parent_hws = (const struct clk_hw *[]){
-				&pcie0_rchng_clk_src.clkr.hw,
+			.parent_names = (const char *[]){
+				"pcie0_rchng_clk_src",
 			},
 			.num_parents = 1,
 			.flags = CLK_SET_RATE_PARENT,
@@ -4390,8 +4389,8 @@ static struct clk_branch gcc_pcie0_axi_s_bridge_clk = {
 		.enable_mask = BIT(0),
 		.hw.init = &(struct clk_init_data){
 			.name = "gcc_pcie0_axi_s_bridge_clk",
-			.parent_hws = (const struct clk_hw *[]){
-				&pcie0_axi_clk_src.clkr.hw,
+			.parent_names = (const char *[]){
+				"pcie0_axi_clk_src"
 			},
 			.num_parents = 1,
 			.flags = CLK_SET_RATE_PARENT,
-- 
2.31.1