On Wed, Jan 26, 2022 at 9:52 PM Jann Horn <jannh@xxxxxxxxxx> wrote: > > Under dummy_hcd, every available endpoint is *either* IN or OUT capable. > But with some real hardware, there are endpoints that support both IN and > OUT. In particular, the PLX 2380 has four available endpoints that each > support both IN and OUT. > > raw-gadget currently gets confused and thinks that any endpoint that is > usable as an IN endpoint can never be used as an OUT endpoint. > > Fix it by looking at the direction in the configured endpoint descriptor > instead of looking at the hardware capabilities. > > With this change, I can use the PLX 2380 with raw-gadget. > > Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface") > Signed-off-by: Jann Horn <jannh@xxxxxxxxxx> > --- > drivers/usb/gadget/legacy/raw_gadget.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c > index c5a2c734234a..d86c3a36441e 100644 > --- a/drivers/usb/gadget/legacy/raw_gadget.c > +++ b/drivers/usb/gadget/legacy/raw_gadget.c > @@ -1004,7 +1004,7 @@ static int raw_process_ep_io(struct raw_dev *dev, struct usb_raw_ep_io *io, > ret = -EBUSY; > goto out_unlock; > } > - if ((in && !ep->ep->caps.dir_in) || (!in && ep->ep->caps.dir_in)) { > + if (in != usb_endpoint_dir_in(ep->ep->desc)) { > dev_dbg(&dev->gadget->dev, "fail, wrong direction\n"); > ret = -EINVAL; > goto out_unlock; > > base-commit: 0280e3c58f92b2fe0e8fbbdf8d386449168de4a8 > -- > 2.35.0.rc0.227.g00780c9af4-goog > Awesome! Thanks for finding this! What do you think about using if ((in && !ep->ep->caps.dir_in) || (!in && !ep->ep->caps.dir_out)) instead? It looks less cryptic: if (in and no in caps) or (out and no out caps) => fail. FTR, I tested both changes with the net2280 hardware that I have, and they work. At least gadget.c from the test suite enumerates properly. Most of the tests still fail. But with g_zero, even more of them fail. P.S. I wonder why everyone suddenly got interested in Raw Gadget lately? :)