linux-kernel - Re: [PATCH V5 08/11] phy: qcom-qmp-ufs: refactor qmp_ufs_power

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <heork6adpw526tfljo2cpexevplpjrlgjgeyobidvzqlsubzlc@6vn6jykxpwqx>
Date: Wed, 21 May 2025 14:50:12 +0100
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Nitin Rawat <quic_nitirawa@...cinc.com>
Cc: vkoul@...nel.org, kishon@...nel.org, 
	James.Bottomley@...senpartnership.com, martin.petersen@...cle.com, bvanassche@....org, 
	andersson@...nel.org, neil.armstrong@...aro.org, dmitry.baryshkov@....qualcomm.com, 
	konrad.dybcio@....qualcomm.com, quic_rdwivedi@...cinc.com, quic_cang@...cinc.com, 
	linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH V5 08/11] phy: qcom-qmp-ufs: refactor qmp_ufs_power_off

On Thu, May 15, 2025 at 09:57:19PM +0530, Nitin Rawat wrote:
> In qmp_ufs_power_off, the PHY is already powered down by asserting
> QPHY_PCS_POWER_DOWN_CONTROL. Therefore, additional phy_reset and
> stopping SerDes are unnecessary. Also this approach does not
> align with the phy HW programming guide.
> 
> Thus, refactor qmp_ufs_power_off to remove the phy_reset and stop
> SerDes calls to simplify the code and ensure alignment with the PHY
> HW programming guide.
> 
> Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
> index fca47e5e8bf0..abfebf0435d8 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
> @@ -1827,13 +1827,6 @@ static int qmp_ufs_power_off(struct phy *phy)
>  	struct qmp_ufs *qmp = phy_get_drvdata(phy);
>  	const struct qmp_phy_cfg *cfg = qmp->cfg;
>  
> -	/* PHY reset */
> -	if (!cfg->no_pcs_sw_reset)
> -		qphy_setbits(qmp->pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
> -
> -	/* stop SerDes */
> -	qphy_clrbits(qmp->pcs, cfg->regs[QPHY_START_CTRL], SERDES_START);
> -
>  	/* Put PHY into POWER DOWN state: active low */
>  	qphy_clrbits(qmp->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
>  			SW_PWRDN);
> -- 
> 2.48.1
> 

-- 
மணிவண்ணன் சதாசிவம்