linux-kernel - Re: [PATCH 06/15] mailbox: mediatek: Add cmdq_mbox

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-next>] [day] [month] [year] [list]

Message-ID: <e4449273185eb7794f344386d9b5a4605cfea4d2.camel@mediatek.com>
Date:   Tue, 19 Sep 2023 01:24:39 +0000
From:   CK Hu (胡俊光) <ck.hu@...iatek.com>
To:     "jassisinghbrar@...il.com" <jassisinghbrar@...il.com>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Singo Chang (張興國) 
        <Singo.Chang@...iatek.com>,
        Johnson Wang (王聖鑫) 
        <Johnson.Wang@...iatek.com>,
        Jason-ch Chen (陳建豪) 
        <Jason-ch.Chen@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Shawn Sung (宋孝謙) 
        <Shawn.Sung@...iatek.com>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Elvis Wang (王军) <Elvis.Wang@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH 06/15] mailbox: mediatek: Add cmdq_mbox_stop to disable
 GCE thread

Hi, Jason:

On Tue, 2023-09-19 at 03:21 +0800, Jason-JH.Lin wrote:
> Add cmdq_mbox_stop to disable GCE thread.
> 
> To support the error handling or the stop flow of the GCE loopping
> thread, lopping thread user can call cmdq_mbox_stop to disable the
> GCE HW thread.
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> ---
>  drivers/mailbox/mtk-cmdq-mailbox.c       | 6 ++++++
>  include/linux/mailbox/mtk-cmdq-mailbox.h | 1 +
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c
> b/drivers/mailbox/mtk-cmdq-mailbox.c
> index 4d62b07c1411..8bd39fecbf00 100644
> --- a/drivers/mailbox/mtk-cmdq-mailbox.c
> +++ b/drivers/mailbox/mtk-cmdq-mailbox.c
> @@ -469,6 +469,12 @@ static void cmdq_mbox_shutdown(struct mbox_chan
> *chan)
>  	spin_unlock_irqrestore(&thread->chan->lock, flags);
>  }
>  
> +void cmdq_mbox_stop(struct mbox_chan *chan)
> +{
> +	cmdq_mbox_shutdown(chan);

cmdq_mobx_stop() is equal to cmdq_mbox_shutdown(), so client driver
could  call mbox_free_channel() to do this and this function is
redundant.

Regards,
CK

> +}
> +EXPORT_SYMBOL(cmdq_mbox_stop);
> +
>  static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long
> timeout)
>  {
>  	struct cmdq_thread *thread = (struct cmdq_thread *)chan-
> >con_priv;
> diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h
> b/include/linux/mailbox/mtk-cmdq-mailbox.h
> index a8f0070c7aa9..f3e577335acb 100644
> --- a/include/linux/mailbox/mtk-cmdq-mailbox.h
> +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
> @@ -79,5 +79,6 @@ struct cmdq_pkt {
>  };
>  
>  u8 cmdq_get_shift_pa(struct mbox_chan *chan);
> +void cmdq_mbox_stop(struct mbox_chan *chan);
>  
>  #endif /* __MTK_CMDQ_MAILBOX_H__ */