linux-kernel - Re: [PATCH 2/5] drm/msm/dp: Use devres for ioremap()

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Message-ID: <CAE-0n53QF1vmjQDcWX8U3UFu=JtjGrK-XNk-1hcm64iRBPNYMA@mail.gmail.com>
Date:   Thu, 22 Jul 2021 20:06:58 +0000
From:   Stephen Boyd <swboyd@...omium.org>
To:     Abhinav Kumar <abhinavk@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Rob Clark <robdclark@...il.com>,
        Rob Herring <robh+dt@...nel.org>, Sean Paul <sean@...rly.run>
Cc:     Kuogee Hsieh <khsieh@...eaurora.org>,
        Tanmay Shah <tanmay@...eaurora.org>,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] drm/msm/dp: Use devres for ioremap()

Quoting Bjorn Andersson (2021-07-21 19:42:24)
> The non-devres version of ioremap is used, which requires manual
> cleanup. But the code paths leading here is mixed with other devres
> users, so rely on this for ioremap as well to simplify the code.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@...omium.org>

>  drivers/gpu/drm/msm/dp/dp_parser.c | 29 ++++-------------------------
>  1 file changed, 4 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
> index 0519dd3ac3c3..c064ced78278 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.c
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.c
> @@ -32,7 +32,7 @@ static int msm_dss_ioremap(struct platform_device *pdev,
>         }
>
>         io_data->len = (u32)resource_size(res);
> -       io_data->base = ioremap(res->start, io_data->len);
> +       io_data->base = devm_ioremap(&pdev->dev, res->start, io_data->len);
>         if (!io_data->base) {
>                 DRM_ERROR("%pS->%s: ioremap failed\n",
>                         __builtin_return_address(0), __func__);

I don't think we need this print either, but that can come later in
addition to using devm_platform_get_and_ioremap_resource().