netdev - [PATCH 07/16] myri10ge: add barrier in myri10ge_send

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 09 May 2008 02:18:45 +0200
From:	Brice Goglin <brice@...i.com>
To:	Jeff Garzik <jeff@...zik.org>
CC:	netdev@...r.kernel.org
Subject: [PATCH 07/16] myri10ge: add barrier in myri10ge_send_cmd

Add a barrier() in the usleep() loop in  myri10ge_send_cmd().
Without the barrier, some mips machine never notices that the
firmware has DMA'ed the response.

Signed-off-by: Brice Goglin <brice@...i.com>
Signed-off-by: Andrew Gallatin <gallatin@...i.com>
---
 drivers/net/myri10ge/myri10ge.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6/drivers/net/myri10ge/myri10ge.c
===================================================================
--- linux-2.6.orig/drivers/net/myri10ge/myri10ge.c    2008-05-09
00:04:48.000000000 +0200
+++ linux-2.6/drivers/net/myri10ge/myri10ge.c    2008-05-09
00:05:30.000000000 +0200
@@ -361,8 +361,10 @@
         for (sleep_total = 0;
              sleep_total < 1000
              && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
-             sleep_total += 10)
+             sleep_total += 10) {
             udelay(10);
+            mb();
+        }
     } else {
         /* use msleep for most command */
         for (sleep_total = 0;

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html