linux-kernel - Re: [PATCH 2/8] firmware: imx: scu-irq: Free mailbox client on failure

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Message-ID: <aO+wg4I1IFxQQ7rf@lizhi-Precision-Tower-5810>
Date: Wed, 15 Oct 2025 10:32:35 -0400
From: Frank Li <Frank.li@....com>
To: Peng Fan <peng.fan@....nxp.com>
Cc: Peng Fan <peng.fan@....com>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Dong Aisheng <aisheng.dong@....com>, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/8] firmware: imx: scu-irq: Free mailbox client on
 failure

On Wed, Oct 15, 2025 at 09:55:03PM +0800, Peng Fan wrote:
> On Tue, Oct 14, 2025 at 11:54:36AM -0400, Frank Li wrote:
> >On Tue, Oct 14, 2025 at 12:54:39PM +0800, Peng Fan wrote:
> >> With mailbox channel freed, it is pointless to keep mailbox client.
> >> So free the mailbox client in err path.
> >>
> >> Signed-off-by: Peng Fan <peng.fan@....com>
> >> ---
> >>  drivers/firmware/imx/imx-scu-irq.c | 1 +
> >>  1 file changed, 1 insertion(+)
> >>
> >> diff --git a/drivers/firmware/imx/imx-scu-irq.c b/drivers/firmware/imx/imx-scu-irq.c
> >> index f2b902e95b738fae90af9cbe54da4f488219906f..1fbe4c3de5c1592bfcf2334a83776c25d5ca7a3f 100644
> >> --- a/drivers/firmware/imx/imx-scu-irq.c
> >> +++ b/drivers/firmware/imx/imx-scu-irq.c
> >> @@ -255,6 +255,7 @@ int imx_scu_enable_general_irq_channel(struct device *dev)
> >>
> >>  free_ch:
> >>  	mbox_free_channel(ch);
> >> +	devm_kfree(dev, cl);
> >
> >
> >you use devm_kmalloc(), when return failure, framework will auto free cl.
> >
> >Avoid mixing manual free and management free code.
> >
> >So I think this patch is not neccesary.
>
> Actually in imx-scu.c, there is only a warning message if this API call returns
> error. So need to free here.

what's warning?

Frank
>
> Thanks
> Peng
>
> >
> >Frank
> >>
> >>  	return ret;
> >>  }
> >>
> >> --
> >> 2.37.1
> >>