linux-kernel - Re: [PATCH 02/17] media: camss: csiphy-3ph: disable interrupts

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]

Date:   Wed, 19 May 2021 17:52:31 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Jonathan Marek <jonathan@...ek.ca>
Cc:     MSM <linux-arm-msm@...r.kernel.org>,
        Andrey Konovalov <andrey.konovalov@...aro.org>,
        Todor Tomov <todor.too@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        "open list:QUALCOMM CAMERA SUBSYSTEM DRIVER" 
        <linux-media@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 02/17] media: camss: csiphy-3ph: disable interrupts

On Tue, 11 May 2021 at 20:08, Jonathan Marek <jonathan@...ek.ca> wrote:
>
> The driver does nothing with the interrupts, so set the irq mask registers
> to zero to avoid wasting CPU time for thing.
>
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> ---
>  .../qcom/camss/camss-csiphy-3ph-1-0.c         | 35 ++-----------------
>  1 file changed, 3 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
> index 5948abdcd220..783b65295d20 100644
> --- a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
> +++ b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
> @@ -352,38 +352,9 @@ static void csiphy_lanes_enable(struct csiphy_device *csiphy,
>         else if (csiphy->camss->version == CAMSS_845)
>                 csiphy_gen2_config_lanes(csiphy, settle_cnt);
>
> -       val = 0xff;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(11));
> -
> -       val = 0xff;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(12));
> -
> -       val = 0xfb;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(13));
> -
> -       val = 0xff;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(14));
> -
> -       val = 0x7f;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(15));
> -
> -       val = 0xff;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(16));
> -
> -       val = 0xff;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(17));
> -
> -       val = 0xef;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(18));
> -
> -       val = 0xff;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(19));
> -
> -       val = 0xff;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(20));
> -
> -       val = 0xff;
> -       writel_relaxed(val, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(21));
> +       /* IRQ_MASK registers - disable all interrupts */
> +       for (i = 11; i < 22; i++)
> +               writel_relaxed(0, csiphy->base + CSIPHY_3PH_CMN_CSI_COMMON_CTRLn(i));
>  }
>
>  static void csiphy_lanes_disable(struct csiphy_device *csiphy,

Reviewed-by: Robert Foss <robert.foss@...aro.org>