linux-kernel - Re: [PATCH] mailbox: mtk-cmdq: Add unregister mailbox controller in cmdq

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Message-ID: <44f6308379a8b6c834df6ff0604c652bf1f7a4b7.camel@mediatek.com>
Date: Thu, 13 Jun 2024 16:53:00 +0000
From: Jason-JH Lin (林睿祥) <Jason-JH.Lin@...iatek.com>
To: "jassisinghbrar@...il.com" <jassisinghbrar@...il.com>,
	"angelogioacchino.delregno@...labora.com"
	<angelogioacchino.delregno@...labora.com>, "chunkuang.hu@...nel.org"
	<chunkuang.hu@...nel.org>
CC: "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "matthias.bgg@...il.com"
	<matthias.bgg@...il.com>, Nancy Lin (林欣螢)
	<Nancy.Lin@...iatek.com>, "linux-mediatek@...ts.infradead.org"
	<linux-mediatek@...ts.infradead.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, Singo Chang (張興國)
	<Singo.Chang@...iatek.com>, Project_Global_Chrome_Upstream_Group
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH] mailbox: mtk-cmdq: Add unregister mailbox controller in
 cmdq_remove()

Hi Angelo,

On Thu, 2024-06-13 at 17:10 +0200, AngeloGioacchino Del Regno wrote:
> Il 13/06/24 17:06, Jason-JH.Lin ha scritto:
> > Add unregister mailbox controller in cmdq_remove to fix cmdq unbind
> > WARN_ON message from pm_runtime_get_sync() in cmdq_mbox_shutdown().
> > 
> > Fixes: 623a6143a845 ("mailbox: mediatek: Add Mediatek CMDQ driver")
> > Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> 
> Hello,
> 
> I think you forgot about...
> 
> 
https://lore.kernel.org/all/6fcd48b14e865c25e6db7559fe6b946537bfa0ce.camel@mediatek.com/
> 

I'll send this series next week after testing it.


> ...as that would also resolve this one without any hacks.

I thought it was another problem, so I sent this patch.

After looking to the kerneldoc of devm_mbox_controller_unregister(), I
found that it's not necessary to call this anywhere.

I'll drop this patch. Thanks for the review.

Regards,
Jason-JH.Lin

> 
> Cheers,
> Angelo
> 
> > ---
> >   drivers/mailbox/mtk-cmdq-mailbox.c | 2 ++
> >   1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c
> > b/drivers/mailbox/mtk-cmdq-mailbox.c
> > index 4aa394e91109..1399e18a39a4 100644
> > --- a/drivers/mailbox/mtk-cmdq-mailbox.c
> > +++ b/drivers/mailbox/mtk-cmdq-mailbox.c
> > @@ -371,6 +371,8 @@ static void cmdq_remove(struct platform_device
> > *pdev)
> >   {
> >   	struct cmdq *cmdq = platform_get_drvdata(pdev);
> >   
> > +	devm_mbox_controller_unregister(&pdev->dev, &cmdq->mbox);
> > +
> >   	if (cmdq->pdata->sw_ddr_en)
> >   		cmdq_sw_ddr_enable(cmdq, false);
> >   
> 
>