usb: gadget: gr_udc: Fix check for invalid number of microframes

The value 0x3 (not 0x11) in the field for additional transaction/microframe
is reserved and should not be let through. Be clear in the error message about
what value caused the error return.

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/gr_udc.c b/drivers/usb/gadget/gr_udc.c
index 99a37ed..c7004ee 100644 (file)
--- a/drivers/usb/gadget/gr_udc.c
+++ b/drivers/usb/gadget/gr_udc.c
@@ -1532,8 +1532,9 @@ static int gr_ep_enable(struct usb_ep *_ep,
                        "%s mode: multiple trans./microframe not valid\n",
                        (mode == 2 ? "Bulk" : "Control"));
                return -EINVAL;
-       } else if (nt == 0x11) {
-               dev_err(dev->dev, "Invalid value for trans./microframe\n");
+       } else if (nt == 0x3) {
+               dev_err(dev->dev,
+                       "Invalid value 0x3 for additional trans./microframe\n");
                return -EINVAL;
        } else if ((nt + 1) * max > buffer_size) {
                dev_err(dev->dev, "Hw buffer size %d < max payload %d * %d\n",