From: Andrey Konovalov andreyknvl@gmail.com
Drop the check on the maximum transfer length in Raw Gadget for both control and non-control transfers.
Limiting the transfer length causes a problem with emulating USB devices whose full configuration descriptor exceeds PAGE_SIZE in length.
Overall, there does not appear to be any reason to enforce any kind of transfer length limit on the Raw Gadget side for either control or non-control transfers, so let's just drop the related check.
Cc: stable@vger.kernel.org Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface") Signed-off-by: Andrey Konovalov andreyknvl@gmail.com --- drivers/usb/gadget/legacy/raw_gadget.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c index 20165e1582d9..b71680c58de6 100644 --- a/drivers/usb/gadget/legacy/raw_gadget.c +++ b/drivers/usb/gadget/legacy/raw_gadget.c @@ -667,8 +667,6 @@ static void *raw_alloc_io_data(struct usb_raw_ep_io *io, void __user *ptr, return ERR_PTR(-EINVAL); if (!usb_raw_io_flags_valid(io->flags)) return ERR_PTR(-EINVAL); - if (io->length > PAGE_SIZE) - return ERR_PTR(-EINVAL); if (get_from_user) data = memdup_user(ptr + sizeof(*io), io->length); else {