linux-kernel - Re: [PATCH] xhci: fix 'broken_suspend' placement in struct xchi

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Message-ID: <20181217141142.GA26880@kroah.com>
Date:   Mon, 17 Dec 2018 15:11:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Mathias Nyman <mathias.nyman@...ux.intel.com>
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Mathias Nyman <mathias.nyman@...el.com>, oneukum@...e.com,
        sandeep.singh@....com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xhci: fix 'broken_suspend' placement in struct xchi_hcd

On Mon, Dec 17, 2018 at 03:59:28PM +0200, Mathias Nyman wrote:
> On 17.12.2018 15:37, Nicolas Saenz Julienne wrote:
> > As commented in the struct's definition there shouldn't be anything
> > underneath it's 'priv[0]' member as it would break some macros.
> > 
> > The patch converts the broken_suspend into a bit-field and relocates it
> > next to to the rest of bit-fields.
> > 
> > Fixes: a7d57abcc8a5 ("xhci: workaround CSS timeout on AMD SNPS 3.0 xHC")
> > Reported-by: Oliver Neukum  <oneukum@...e.com>
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> > ---
> >   drivers/usb/host/xhci.h | 4 ++--
> >   1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
> > index c3515bad5dbb..011dd45f8718 100644
> > --- a/drivers/usb/host/xhci.h
> > +++ b/drivers/usb/host/xhci.h
> > @@ -1863,6 +1863,8 @@ struct xhci_hcd {
> >   	unsigned		sw_lpm_support:1;
> >   	/* support xHCI 1.0 spec USB2 hardware LPM */
> >   	unsigned		hw_lpm_support:1;
> > +	/* Broken Suspend flag for SNPS Suspend resume issue */
> > +	unsigned		broken_suspend:1;
> >   	/* cached usb2 extened protocol capabilites */
> >   	u32                     *ext_caps;
> >   	unsigned int            num_ext_caps;
> > @@ -1880,8 +1882,6 @@ struct xhci_hcd {
> >   	void			*dbc;
> >   	/* platform-specific data -- must come last */
> >   	unsigned long		priv[0] __aligned(sizeof(s64));
> > -	/* Broken Suspend flag for SNPS Suspend resume issue */
> > -	u8			broken_suspend;
> >   };
> >   /* Platform specific overrides to generic XHCI hc_driver ops */
> > 
> 
> Thanks, not sure how I missed that.
> 
> Greg, in case you want to pick this simple fix to 4.20 still:
> Acked-by: Mathias Nyman <mathias.nyman@...ux.intel.com>

I can queue it up, thanks!

greg k-h