linux-kernel - Re: [PATCH] drm/bridge: anx7625: Fix release wrong workqueue

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Date:   Thu, 17 Feb 2022 11:02:05 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Xin Ji <xji@...logixsemi.com>
Cc:     andrzej.hajda@...el.com, Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, bliang@...logixsemi.com,
        qwen@...logixsemi.com,
        Xin Ji <xji@...logix.corp-partner.google.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/bridge: anx7625: Fix release wrong workqueue

On Thu, Feb 17, 2022 at 10:45 AM Xin Ji <xji@...logixsemi.com> wrote:
>
> From: Xin Ji <xji@...logix.corp-partner.google.com>
>
> If "hdcp_workqueue" exist, must release "hdcp_workqueue",
> not "workqueue".
>
> Fixes: cd1637c7e480 ("drm/bridge: anx7625: add HDCP support")
> Signed-off-by: Xin Ji <xji@...logixsemi.com>
> ---
Reviewed-by: Hsin-Yi Wang <hsinyi@...omium.org>

This fixes an issue that the driver will crash during unbind.

>  drivers/gpu/drm/bridge/analogix/anx7625.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> index 633618bafd75..9aab879a8851 100644
> --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> @@ -2736,8 +2736,8 @@ static int anx7625_i2c_remove(struct i2c_client *client)
>
>         if (platform->hdcp_workqueue) {
>                 cancel_delayed_work(&platform->hdcp_work);
> -               flush_workqueue(platform->workqueue);
> -               destroy_workqueue(platform->workqueue);
> +               flush_workqueue(platform->hdcp_workqueue);
> +               destroy_workqueue(platform->hdcp_workqueue);
>         }
>
>         if (!platform->pdata.low_power_mode)
> --
> 2.25.1
>