usb gadget: fix fsl_usb2_udc potential OOPS
For fsl_usb2_udc driver, ep0 also has a descriptor. Current code is
misleading and contains a logical mistake. Here is the patch to fix it.
http://bugzilla.kernel.org/show_bug.cgi?id=9595
Cc: stable <stable@kernel.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/fsl_usb2_udc.c b/drivers/usb/gadget/fsl_usb2_udc.c
index 038e7d7..d59eb92 100644
--- a/drivers/usb/gadget/fsl_usb2_udc.c
+++ b/drivers/usb/gadget/fsl_usb2_udc.c
@@ -776,7 +776,7 @@
VDBG("%s, bad params\n", __FUNCTION__);
return -EINVAL;
}
- if (!_ep || (!ep->desc && ep_index(ep))) {
+ if (unlikely(!_ep || !ep->desc)) {
VDBG("%s, bad ep\n", __FUNCTION__);
return -EINVAL;
}