From 05d3cc414dbf9657a394738fd5b7cea36f08c8ca Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Mon, 22 Apr 2013 18:50:29 +0200
Subject: [PATCH] ether8169: fix deadlock in allocation error case for attach.
 (thanks erik)

typo in error case, should qunlock() instead of qlock().
---
 sys/src/9/pc/ether8169.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/src/9/pc/ether8169.c b/sys/src/9/pc/ether8169.c
index c17d0a51e..6c9a610ec 100644
--- a/sys/src/9/pc/ether8169.c
+++ b/sys/src/9/pc/ether8169.c
@@ -765,11 +765,13 @@ rtl8169attach(Ether* edev)
 			ctlr->rd = nil;
 			free(ctlr->dtcc);
 			ctlr->dtcc = nil;
-			qlock(&ctlr->alock);
+			qunlock(&ctlr->alock);
 			error(Enomem);
 		}
 		ctlr->init = 1;
 		kproc("rtl8169", rtl8169reseter, edev);
+
+		/* rtl8169reseter() does qunlock(&ctlr->alock) when complete */
 		qlock(&ctlr->alock);
 	}
 	qunlock(&ctlr->alock);