From: Jann Horn jannh@google.com
commit 292d2c82b105d92082c2120a44a58de9767e44f1 upstream.
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") Cc: stable stable@vger.kernel.org Tested-by: Andrey Konovalov andreyknvl@gmail.com Reviewed-by: Andrey Konovalov andreyknvl@gmail.com Signed-off-by: Jann Horn jannh@google.com Link: https://lore.kernel.org/r/20220126205214.2149936-1-jannh@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/legacy/raw_gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- 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_ 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;