linux-kernel - Re: [PATCH] drm/msm/dsi: Use connector directly in msm_dsi_manager_connector

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Date:   Sun, 10 Apr 2022 22:55:27 -0700
From:   Abhinav Kumar <quic_abhinavk@...cinc.com>
To:     Stephen Boyd <swboyd@...omium.org>,
        Rob Clark <robdclark@...il.com>, "Sean Paul" <sean@...rly.run>
CC:     <linux-kernel@...r.kernel.org>, <freedreno@...ts.freedesktop.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        "Dmitry Baryshkov" <dmitry.baryshkov@...aro.org>,
        Sean Paul <seanpaul@...omium.org>
Subject: Re: [PATCH] drm/msm/dsi: Use connector directly in
 msm_dsi_manager_connector_init()



On 3/17/2022 5:07 PM, Stephen Boyd wrote:
> The member 'msm_dsi->connector' isn't assigned until
> msm_dsi_manager_connector_init() returns (see msm_dsi_modeset_init() and
> how it assigns the return value). Therefore this pointer is going to be
> NULL here. Let's use 'connector' which is what was intended.
> 
> Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Cc: Sean Paul <seanpaul@...omium.org>
> Fixes: 6d5e78406991 ("drm/msm/dsi: Move dsi panel init into modeset init path")
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
> 
> I don't know if this is superseeded by something else but I found this
> while trying to use the connector from msm_dsi in this function.
> 
>   drivers/gpu/drm/msm/dsi/dsi_manager.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> index 0c1b7dde377c..9f6af0f0fe00 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> @@ -638,7 +638,7 @@ struct drm_connector *msm_dsi_manager_connector_init(u8 id)
>   	return connector;
>   
>   fail:
> -	connector->funcs->destroy(msm_dsi->connector);
> +	connector->funcs->destroy(connector);
>   	return ERR_PTR(ret);
>   }
>   
> 
> base-commit: 05afd57f4d34602a652fdaf58e0a2756b3c20fd4