This is a note to let you know that I've just added the patch titled

usb: raw-gadget: fix handling of dual-direction-capable endpoints

to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 292d2c82b105d92082c2120a44a58de9767e44f1 Mon Sep 17 00:00:00 2001 From: Jann Horn jannh@google.com Date: Wed, 26 Jan 2022 21:52:14 +0100 Subject: usb: raw-gadget: fix handling of dual-direction-capable endpoints

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(-)

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;