netdev - RE: [PATCH net-next] can: flexcan: flexcan_chip_start(): fix the error return code in flexcan_setup_stop

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Date:   Tue, 4 Dec 2018 12:35:06 +0000
From:   Aisheng DONG <aisheng.dong@....com>
To:     Wei Yongjun <weiyongjun1@...wei.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
CC:     "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        Joakim Zhang <qiangqing.zhang@....com>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH net-next] can: flexcan: flexcan_chip_start(): fix the
 error return code in flexcan_setup_stop_mode()

Copy Joakim.

> > From: Wei Yongjun [mailto:weiyongjun1@...wei.com]
[...]
> > Subject: [PATCH net-next] can: flexcan: flexcan_chip_start(): fix the
> > error return code in flexcan_setup_stop_mode()
> >
> > The error return code PTR_ERR(gpr_np) is always 0 since gpr_np is
> > equal to NULL in this error handling case. Fix it by return -ENOENT.
> >
> > Fixes: de3578c198c6 ("can: flexcan: add self wakeup support")
> > Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
> > ---
> >  drivers/net/can/flexcan.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
> > index
> > 0f36eaf..f412d84 100644
> > --- a/drivers/net/can/flexcan.c
> > +++ b/drivers/net/can/flexcan.c
> > @@ -1432,7 +1432,7 @@ static int flexcan_setup_stop_mode(struct
> > platform_device *pdev)
> >  	gpr_np = of_find_node_by_phandle(phandle);
> >  	if (!gpr_np) {
> >  		dev_dbg(&pdev->dev, "could not find gpr node by phandle\n");
> > -		return PTR_ERR(gpr_np);
> > +		return -ENOENT;
> 
> Good catch.
> 
> Reviewed-by: Dong Aisheng <aisheng.dong@....com>
> 
> Regards
> Dong Aisheng
> 
> >  	}
> >
> >  	priv = netdev_priv(dev);
> >
> >