From 138277120cbc4a2852b3b6d0ca20d0357599ffce Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Mon, 20 Jan 2014 17:45:36 +0000
Subject: [PATCH] Don't lock in the generic grab just to lock again in the
 specific grabs. (I committed the wrong version of uart_core.c, which still
 had this).

Pointy hat: imp
---
 sys/dev/uart/uart_core.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/sys/dev/uart/uart_core.c b/sys/dev/uart/uart_core.c
index 08ac57657c2c..eea2d8ce80a1 100644
--- a/sys/dev/uart/uart_core.c
+++ b/sys/dev/uart/uart_core.c
@@ -629,18 +629,14 @@ void
 uart_grab(struct uart_devinfo *di)
 {
 
-	uart_lock(di->hwmtx);
 	if (di->sc)
 		UART_GRAB(di->sc);
-	uart_unlock(di->hwmtx);
 }
 
 void
 uart_ungrab(struct uart_devinfo *di)
 {
 
-	uart_lock(di->hwmtx);
 	if (di->sc)
 		UART_UNGRAB(di->sc);
-	uart_unlock(di->hwmtx);
 }