linux-kernel - Re: [PATCH] clk: qcom: gdsc: Bump parent usage count when GDSC is found enabled

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: <20220607121548.fhzpjcmoahlkue4t@halaneylaptop>
Date:   Tue, 7 Jun 2022 07:15:48 -0500
From:   Andrew Halaney <ahalaney@...hat.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk: qcom: gdsc: Bump parent usage count when GDSC is
 found enabled

On Mon, Jun 06, 2022 at 02:21:12PM -0700, Bjorn Andersson wrote:
> When a GDSC is found to be enabled at boot the pm_runtime state will
> be unbalanced as the GDSC is later turned off. Fix this by increasing
> the usage counter on the power-domain, in line with how we handled the
> regulator state.
> 
> Fixes: 1b771839de05 ("clk: qcom: gdsc: enable optional power domain support")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  drivers/clk/qcom/gdsc.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
> index 44520efc6c72..a1fa7c4cff60 100644
> --- a/drivers/clk/qcom/gdsc.c
> +++ b/drivers/clk/qcom/gdsc.c
> @@ -420,6 +420,9 @@ static int gdsc_init(struct gdsc *sc)
>  				return ret;
>  		}
>  
> +		/* ...and the power-domain */
> +		gdsc_pm_runtime_get(sc);
> +
>  		/*
>  		 * Votable GDSCs can be ON due to Vote from other masters.
>  		 * If a Votable GDSC is ON, make sure we have a Vote.
> -- 
> 2.35.1
> 

Makes sense to me!

Reviewed-by: Andrew Halaney <ahalaney@...hat.com>