[v4,04/10] usb: ehci-orion: add S2RAM support

[Miquel Raynal <miquel.raynal@bootlin.com>]

Hi Alan,

Alan Stern <stern@rowland.harvard.edu> wrote on Mon, 28 Jan 2019
10:27:53 -0500 (EST):

> On Mon, 28 Jan 2019, Miquel Raynal wrote:
> 
> > Hi Alan,
> > 
> > Alan Stern <stern@rowland.harvard.edu> wrote on Fri, 25 Jan 2019
> > 21:56:27 -0500 (EST):
> >   
> > > On Fri, 25 Jan 2019, Miquel Raynal wrote:
> > >   
> > > > Add suspend/resume callbacks to reset the host controller properly
> > > > during S2RAM operation.
> > > > 
> > > > Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> > > > ---
> > > >  drivers/usb/host/ehci-orion.c | 18 ++++++++++++++++++
> > > >  1 file changed, 18 insertions(+)
> > > > 
> > > > diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
> > > > index 3109f082949e..0dab099b5d15 100644
> > > > --- a/drivers/usb/host/ehci-orion.c
> > > > +++ b/drivers/usb/host/ehci-orion.c
> > > > @@ -182,6 +182,23 @@ static int ehci_orion_drv_reset(struct usb_hcd *hcd)
> > > >  	return ret;
> > > >  }
> > > >  
> > > > +static int __maybe_unused ehci_orion_drv_suspend(struct device *dev)
> > > > +{
> > > > +	struct usb_hcd *hcd = dev_get_drvdata(dev);
> > > > +
> > > > +	return ehci_suspend(hcd, device_may_wakeup(dev));    
> > > 
> > > Okay, good.
> > >   
> > > > +}
> > > > +
> > > > +static int __maybe_unused ehci_orion_drv_resume(struct device *dev)
> > > > +{
> > > > +	struct usb_hcd *hcd = dev_get_drvdata(dev);
> > > > +
> > > > +	return ehci_resume(hcd, device_may_wakeup(dev));    
> > > 
> > > Not so good.  The second argument here is force_reset; presumably you 
> > > want it always to be false.  (Note that the v3 version of this patch 
> > > did not call device_may_wakeup() in ehci_orion_drv_resume.)
> > > 
> > > Yes, the API is not symmetrical.  So sue me...  
> > 
> > Oh right, I completely overlooked that one. Indeed the second parameter
> > should be "false", as in the v3. Do you mind if I send a v5 only for
> > this patch? If the rest looks good to you of course.  
> 
> To avoid confusing Greg, it would be best to send v5 of all the patches
> that he should apply.  The rest of the EHCI changes look okay, and when
> you fix this you can add:
> 
> Acked-by: Alan Stern <stern@rowland.harvard.edu>

Sure!


Thanks,
Miquèl