On Wed, May 10, 2017 at 10:00:35AM -0400, Alan Stern wrote:
> On Wed, 10 May 2017, Johan Hovold wrote:
>
> > Only flag the first and only port as non-removable in accordance with
> > the specifications, while also leaving the reserved bit zero unset.
> >
> > "Within a byte, if no port exists for a given location, the bit
> > field representing the port characteristics shall be 0."
> >
> > Also add a comment marking the legacy PortPwrCtrlMask field.
> >
> > Fixes: 1cd8fd2887e1 ("usb: gadget: dummy_hcd: add SuperSpeed support")
> > Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> > Cc: Tatyana Brokhman <[email protected]>
> > Signed-off-by: Johan Hovold <[email protected]>
> > ---
> > drivers/usb/gadget/udc/dummy_hcd.c | 6 +++---
> > 1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/usb/gadget/udc/dummy_hcd.c
> > b/drivers/usb/gadget/udc/dummy_hcd.c
> > index c79081952ea0..17fc2fa2b2b1 100644
> > --- a/drivers/usb/gadget/udc/dummy_hcd.c
> > +++ b/drivers/usb/gadget/udc/dummy_hcd.c
> > @@ -2008,7 +2008,7 @@ ss_hub_descriptor(struct usb_hub_descriptor *desc)
> > HUB_CHAR_COMMON_OCPM);
> > desc->bNbrPorts = 1;
> > desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
> > - desc->u.ss.DeviceRemovable = 0xffff;
> > + desc->u.ss.DeviceRemovable = cpu_to_le16(BIT(1));
> > }
> >
> > static inline void hub_descriptor(struct usb_hub_descriptor *desc)
> > @@ -2020,8 +2020,8 @@ static inline void hub_descriptor(struct
> > usb_hub_descriptor *desc)
> > HUB_CHAR_INDV_PORT_LPSM |
> > HUB_CHAR_COMMON_OCPM);
> > desc->bNbrPorts = 1;
> > - desc->u.hs.DeviceRemovable[0] = 0xff;
> > - desc->u.hs.DeviceRemovable[1] = 0xff;
> > + desc->u.hs.DeviceRemovable[0] = BIT(1);
>
> Shouldn't these values be 0? The gadget attached to dummy-hcd _is_
> removable; it can be removed by rmmod.
Yes, you're right. I'll respin this one.
Thanks,
Johan
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