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From: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
To: Corey Minyard <minyard@acm.org>
Cc: openipmi-developer@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: [PATCH] ipmi: Fix a problem that messages are not issued in run_to_completion mode
Date: Thu, 23 Apr 2015 11:16:44 +0900	[thread overview]
Message-ID: <5538560C.1040502@hitachi.com> (raw)

start_next_msg() issues a message placed in smi_info->waiting_msg
if it is non-NULL.  However, sender() sets a message to
smi_info->curr_msg and NULL to smi_info->waiting_msg in the context
of run_to_completion mode.  As the result, it leads an infinite
loop by waiting the completion of unissued message when leaving
dying message after kernel panic.

sender() should set the message to smi_info->waiting_msg not
curr_msg.

Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: openipmi-developer@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org
---
 drivers/char/ipmi/ipmi_si_intf.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 5e90a18..3d49c70 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -942,8 +942,7 @@ static void sender(void                *send_info,
 		 * If we are running to completion, start it and run
 		 * transactions until everything is clear.
 		 */
-		smi_info->curr_msg = msg;
-		smi_info->waiting_msg = NULL;
+		smi_info->waiting_msg = msg;
 
 		/*
 		 * Run to completion means we are single-threaded, no
-- 
1.8.3.1


             reply	other threads:[~2015-04-23  2:16 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-23  2:16 Hidehiro Kawai [this message]
2015-04-24 13:00 ` [PATCH] ipmi: Fix a problem that messages are not issued in run_to_completion mode Corey Minyard
2015-04-28 12:41   ` Hidehiro Kawai
2015-05-06 12:27     ` Corey Minyard
2015-05-07 12:01       ` Hidehiro Kawai

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