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

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Message-ID: <bc08f938-a315-4797-931b-5c11d402670b@oss.qualcomm.com>
Date: Fri, 9 Jan 2026 11:49:29 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Val Packett <val@...kett.cool>, Vinod Koul <vkoul@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Abel Vesa <abelvesa@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] phy: qcom: edp: Fix NULL pointer dereference for phy v6
 (x1e80100)

On 1/9/26 5:50 AM, Val Packett wrote:
> 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,

Let's just point it to the existing qcom_edp_com_clk_fwd_cfg_v4

Konrad