Re: [patch v2] usb: phy: msm: change devm_ioremap() to devm_ioremap_resource()

[Dan Carpenter <dan.carpenter@oracle.com>]

On Mon, May 19, 2014 at 12:19:10PM +0300, Ivan T. Ivanov wrote:
> On Wed, 2014-05-14 at 16:54 +0300, Dan Carpenter wrote:
> > There are several issues here:
> > 1) platform_get_resource() can return NULL and that wasn't handled.
> > 2) We should request the memory before we remap it, and
> >    devm_ioremap_resource() does that.
> > 3) devm_ioremap() returns a NULL but we were checking for IS_ERR().
> > 
> > Fixes: 6b99c68ec1f9 ('usb: phy: msm: Migrate to Managed Device Resource allocation')
> > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> > ---
> > v2: the first version just swapped the IS_ERR() check for a NULL check
> > 
> > Thanks everyone for the review.  In the end, it was still a one line fix
> > so I forgive you Ivan.
> > 
> > diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
> > index c522c4f..4f88174 100644
> > --- a/drivers/usb/phy/phy-msm-usb.c
> > +++ b/drivers/usb/phy/phy-msm-usb.c
> > @@ -1586,7 +1586,7 @@ static int msm_otg_probe(struct platform_device *pdev)
> >  				      np ? "alt_core" : "usb_hs_core_clk");
> >  
> >  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > -	motg->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
> > +	motg->regs = devm_ioremap_resource(&pdev->dev, res);
> 
> 
> Thank you Dan, but this will not going to work. Address space is 
> shared between this PHY driver and CI device controller driver.
> First version plus adding required check for 'res' as suggested
> by Sergei will fix this.
> 

People, I'm really sorry about this.  I knew there was a risk when I
sent the patch.  I don't have a way to test this and my changelog was
too confident, more than it should have been.  This was my fault.

I will send a patch to fix it.

regards,
dan carpenter