diff mbox

[v3,12/13] usb: phy: msm: Properly check core interrupt number

Message ID 1381764280-28420-13-git-send-email-iivanov@mm-sol.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ivan T. Ivanov Oct. 14, 2013, 3:24 p.m. UTC 
From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

IRQ with number 0 is valid case, so check for negative
numbers instead.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
---
 drivers/usb/phy/phy-msm-usb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Felipe Balbi Oct. 14, 2013, 10:59 p.m. UTC | #1 
On Mon, Oct 14, 2013 at 06:24:39PM +0300, Ivan T. Ivanov wrote:
> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> 
> IRQ with number 0 is valid case, so check for negative

not entirelly correct... IRQ 0 isn't supposed to be used as a linux IRQ
number IIRC.

> numbers instead.
> 
> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> ---
>  drivers/usb/phy/phy-msm-usb.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
> index ca2abe6..f34c8a9 100644
> --- a/drivers/usb/phy/phy-msm-usb.c
> +++ b/drivers/usb/phy/phy-msm-usb.c
> @@ -1415,7 +1415,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
>  	dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
>  
>  	motg->irq = platform_get_irq(pdev, 0);
> -	if (!motg->irq) {
> +	if (motg->irq < 0) {

this check is correct though, since platform_get_irq() will return
-ENXIO if it doesn't find IRQ resource.
Ivan T. Ivanov Oct. 15, 2013, 7:12 a.m. UTC | #2 
On Mon, 2013-10-14 at 17:59 -0500, Felipe Balbi wrote: 
> On Mon, Oct 14, 2013 at 06:24:39PM +0300, Ivan T. Ivanov wrote:
> > From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> > 
> > IRQ with number 0 is valid case, so check for negative
> 
> not entirelly correct... IRQ 0 isn't supposed to be used as a linux IRQ
> number IIRC.

I am not really sure. NO_IRQ is -1 at least on ARM. Also when
taking into account irqdomain's zero as interrupt number is valid??

> 
> > numbers instead.
> > 
> > Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> > ---
> >  drivers/usb/phy/phy-msm-usb.c |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
> > index ca2abe6..f34c8a9 100644
> > --- a/drivers/usb/phy/phy-msm-usb.c
> > +++ b/drivers/usb/phy/phy-msm-usb.c
> > @@ -1415,7 +1415,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
> >  	dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
> >  
> >  	motg->irq = platform_get_irq(pdev, 0);
> > -	if (!motg->irq) {
> > +	if (motg->irq < 0) {
> 
> this check is correct though, since platform_get_irq() will return
> -ENXIO if it doesn't find IRQ resource.
> 

Thanks,
Ivan
diff mbox

Patch

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index ca2abe6..f34c8a9 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -1415,7 +1415,7 @@  static int __init msm_otg_probe(struct platform_device *pdev)
 	dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
 
 	motg->irq = platform_get_irq(pdev, 0);
-	if (!motg->irq) {
+	if (motg->irq < 0) {
 		dev_err(&pdev->dev, "platform_get_irq failed\n");
 		return motg->irq;
 	}