linux-kernel - [PATCH] phy: qcom: edp: Fix NULL pointer dereference for phy v6 (x1e80100)

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Message-ID: <20260109045214.5983-1-val@packett.cool>
Date: Fri,  9 Jan 2026 01:50:28 -0300
From: Val Packett <val@...kett.cool>
To: Vinod Koul <vkoul@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Abel Vesa <abelvesa@...nel.org>,
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Val Packett <val@...kett.cool>,
	linux-arm-msm@...r.kernel.org,
	linux-phy@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] phy: qcom: edp: Fix NULL pointer dereference for phy v6 (x1e80100)

For Glymur SoC support, the com_clk_fwd_cfg callback was added, and a
stub implementation was added for the v4 of the hardware. However it
was omitted for the v6, causing a NULL pointer dereference oops on
Hamoa/Purwa (X1E/X1P) SoC devices. Fix by adding the appropriate stub.

Fixes: add66a6673bc ("phy: qcom: edp: Add Glymur platform support")
Signed-off-by: Val Packett <val@...kett.cool>
---
 drivers/phy/qualcomm/phy-qcom-edp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c
index 13feab99feec..a17492db21d8 100644
--- a/drivers/phy/qualcomm/phy-qcom-edp.c
+++ b/drivers/phy/qualcomm/phy-qcom-edp.c
@@ -613,6 +613,11 @@ static int qcom_edp_phy_com_resetsm_cntrl_v6(const struct qcom_edp *edp)
 				     val, val & BIT(0), 500, 10000);
 }
 
+static int qcom_edp_com_clk_fwd_cfg_v6(const struct qcom_edp *edp)
+{
+	return 0;
+}
+
 static int qcom_edp_com_bias_en_clkbuflr_v6(const struct qcom_edp *edp)
 {
 	/* Turn on BIAS current for PHY/PLL */
@@ -758,6 +763,7 @@ static const struct phy_ver_ops qcom_edp_phy_ops_v6 = {
 	.com_power_on		= qcom_edp_phy_power_on_v6,
 	.com_resetsm_cntrl	= qcom_edp_phy_com_resetsm_cntrl_v6,
 	.com_bias_en_clkbuflr	= qcom_edp_com_bias_en_clkbuflr_v6,
+	.com_clk_fwd_cfg	= qcom_edp_com_clk_fwd_cfg_v6,
 	.com_configure_pll	= qcom_edp_com_configure_pll_v6,
 	.com_configure_ssc	= qcom_edp_com_configure_ssc_v6,
 };
-- 
2.51.2