Re: [PATCH] mfd: mt6397: irq domain should initialize before mfd_add_devices()

[Henry Chen]

On Wed, 2016-03-30 at 11:18 +0200, John Crispin wrote:
> Hi,
> 
> small nitpick inline
> 
> On 30/03/2016 09:25, Henry Chen wrote:
> > Some sub driver like RTC module need irq domain from parent to create
> > irq mapping when driver initialize. so move mt6397_irq_init() before
> > mfd_add_devices().
> > 
> > Signed-off-by: Henry Chen <henryc.chen@xxxxxxxxxxxx>
> > ---
> > This patch fixed the below warning based on "Linux kernel v4.6-rc1"
> > WARNING: CPU: 1 PID: 132 at kernel/mediatek/kernel/irq/irqdomain.c:471
> > irq_create_mapping+0xc4/0xd0
> > ---
> >  drivers/mfd/mt6397-core.c | 37 ++++++++++++++++++++++---------------
> >  1 file changed, 22 insertions(+), 15 deletions(-)
> > 
> > diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
> > index 8e8d932..a879223 100644
> > --- a/drivers/mfd/mt6397-core.c
> > +++ b/drivers/mfd/mt6397-core.c
> > @@ -270,22 +270,36 @@ static int mt6397_probe(struct platform_device *pdev)
> >  		goto fail_irq;
> >  	}
> >  
> > +	pmic->irq = platform_get_irq(pdev, 0);
> > +
> >  	switch (id & 0xff) {
> >  	case MT6323_CID_CODE:
> > -		pmic->int_con[0] = MT6323_INT_CON0;
> > -		pmic->int_con[1] = MT6323_INT_CON1;
> > -		pmic->int_status[0] = MT6323_INT_STATUS0;
> > -		pmic->int_status[1] = MT6323_INT_STATUS1;
> > +		if (pmic->irq > 0) {
> 
> should this not be
> 
> 		if (pmic->irq >= 0) {
> 
> i think the code before your patch was wrong as linux irqs start with 0.
> 
> 	John
Hi John,

Thanks, I will modify this.

Henry

> 
> 
> > +			pmic->int_con[0] = MT6323_INT_CON0;
> > +			pmic->int_con[1] = MT6323_INT_CON1;
> > +			pmic->int_status[0] = MT6323_INT_STATUS0;
> > +			pmic->int_status[1] = MT6323_INT_STATUS1;
> > +			ret = mt6397_irq_init(pmic);
> > +			if (ret)
> > +				return ret;
> > +		}
> > +
> >  		ret = mfd_add_devices(&pdev->dev, -1, mt6323_devs,
> >  				ARRAY_SIZE(mt6323_devs), NULL, 0, NULL);
> >  		break;
> >  
> >  	case MT6397_CID_CODE:
> >  	case MT6391_CID_CODE:
> > -		pmic->int_con[0] = MT6397_INT_CON0;
> > -		pmic->int_con[1] = MT6397_INT_CON1;
> > -		pmic->int_status[0] = MT6397_INT_STATUS0;
> > -		pmic->int_status[1] = MT6397_INT_STATUS1;
> > +		if (pmic->irq > 0) {
> > +			pmic->int_con[0] = MT6397_INT_CON0;
> > +			pmic->int_con[1] = MT6397_INT_CON1;
> > +			pmic->int_status[0] = MT6397_INT_STATUS0;
> > +			pmic->int_status[1] = MT6397_INT_STATUS1;
> > +			ret = mt6397_irq_init(pmic);
> > +			if (ret)
> > +				return ret;
> > +		}
> > +
> >  		ret = mfd_add_devices(&pdev->dev, -1, mt6397_devs,
> >  				ARRAY_SIZE(mt6397_devs), NULL, 0, NULL);
> >  		break;
> > @@ -296,13 +310,6 @@ static int mt6397_probe(struct platform_device *pdev)
> >  		break;
> >  	}
> >  
> > -	pmic->irq = platform_get_irq(pdev, 0);
> > -	if (pmic->irq > 0) {
> > -		ret = mt6397_irq_init(pmic);
> > -		if (ret)
> > -			return ret;
> > -	}
> > -
> >  fail_irq:
> >  	if (ret) {
> >  		irq_domain_remove(pmic->irq_domain);
> >