Hi, Dmitry Osipenko <digetx@xxxxxxxxx> writes: > This quirk is required to make USB Ethernet gadget working with HW that > can't cope with unaligned DMA. For some reason only f_ncm handles that > quirk, let's handle it in the rest of the network models. All models have > been tested with a ChipIdea UDC driver on NVIDIA Tegra20 SoC that require > DMA to be aligned. > > Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> > --- > drivers/usb/gadget/function/f_ecm.c | 7 +++++++ > drivers/usb/gadget/function/f_eem.c | 5 +++++ > drivers/usb/gadget/function/f_rndis.c | 4 ++++ > 3 files changed, 16 insertions(+) > > diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c > index 4c488d15b6f6..1d198055fd74 100644 > --- a/drivers/usb/gadget/function/f_ecm.c > +++ b/drivers/usb/gadget/function/f_ecm.c > @@ -584,6 +584,13 @@ static int ecm_set_alt(struct usb_function *f, unsigned intf, unsigned alt) > */ > ecm->port.is_zlp_ok = > gadget_is_zlp_supported(cdev->gadget); > + > + /* Setup DMA alignment workaround for UDC's that > + * need it. > + */ > + ecm->port.no_skb_reserve = > + gadget_avoids_skb_reserve(cdev->gadget); looks like the quirk should be moved to u_ether.c instead. -- balbi
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