Re: [PATCH 3/4] usb: chipidea: don't clobber return value of ci_role_start()

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On Thu, Aug 01, 2013 at 10:40:42AM +0200, Lothar Waßmann wrote:
> Hi,
> 
> Peter Chen writes:
> > On Wed, Jul 31, 2013 at 04:21:15PM +0200, Lothar Waßmann wrote:
> > > 
> > > Signed-off-by: Lothar Waßmann <LW@xxxxxxxxxxxxxxxxxxx>
> > > ---
> > >  drivers/usb/chipidea/core.c |    1 -
> > >  1 files changed, 0 insertions(+), 1 deletions(-)
> > > 
> > > diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> > > index a5df24c..38b0a7a 100644
> > > --- a/drivers/usb/chipidea/core.c
> > > +++ b/drivers/usb/chipidea/core.c
> > > @@ -497,7 +497,6 @@ static int ci_hdrc_probe(struct platform_device *pdev)
> > >  	ret = ci_role_start(ci, ci->role);
> > >  	if (ret) {
> > >  		dev_err(dev, "can't start %s role\n", ci_role(ci)->name);
> > > -		ret = -ENODEV;
> > >  		goto rm_wq;
> > >  	}
> > >  
> > 
> > +1, it can help get the error one time, without need to add the code
> > and get the error number from ci_role_start again.
> > 
> I don't get what you mean.
> 

For example, the ci_role_start returns error, the user can't
get error message directly, it can only get -ENODEV. If
the user wants to get what's error at ci_role_start, he
needs to add another debug message and re-compile the kernel.

-- 

Best Regards,
Peter Chen

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