staging: gasket: gasket_handle_ioctl fix ioctl exit trace param

Pass the return value from the device ioctl permissions callback to the
tracepoint when the callback returns an error.
Reported-by: Dmitry Torokhov <dtor@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gasket/gasket_ioctl.c

@@ -65,7 +65,7 @@ long gasket_handle_ioctl(struct file *filp, uint cmd, void __user *argp)
 	if (ioctl_permissions_cb) {
 		retval = ioctl_permissions_cb(filp, cmd, argp);
 		if (retval < 0) {
-			trace_gasket_ioctl_exit(-EPERM);
+			trace_gasket_ioctl_exit(retval);
 			return retval;
 		} else if (retval == 0) {
 			trace_gasket_ioctl_exit(-EPERM);