linux-kernel - [PATCH 1/6] ipmi: decreases the IPMI message transaction time in interrupt mode

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Date:	Fri, 03 Feb 2012 09:47:54 -0600
From:	Corey Minyard <cminyard@...sta.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	OpenIPMI Developers <openipmi-developer@...ts.sourceforge.net>,
	Srinivas_Gowda <srinivas_g_gowda@...l.com>,
	Corey Minyard <cminyard@...sta.com>
Subject: [PATCH 1/6] ipmi: decreases the IPMI message transaction time in
 interrupt mode

From: Srinivas_Gowda <srinivas_g_gowda@...l.com>

Call the event handler immediately after starting the next message.

This change considerably decreases the IPMI transaction time (cuts off
~9ms for a single ipmitool transaction).

From: Srinivas_Gowda <srinivas_g_gowda@...l.com>
Signed-off-by: Srinivas_Gowda <srinivas_g_gowda@...l.com>
Signed-off-by: Corey Minyard <cminyard@...sta.com>
---
 drivers/char/ipmi/ipmi_si_intf.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 50fcf9c..73ebbb1 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -932,8 +932,10 @@ static void sender(void                *send_info,
 	spin_unlock_irqrestore(&smi_info->msg_lock, flags);
 
 	spin_lock_irqsave(&smi_info->si_lock, flags);
-	if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL)
+	if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
 		start_next_msg(smi_info);
+		smi_event_handler(smi_info, 0);
+	}
 	spin_unlock_irqrestore(&smi_info->si_lock, flags);
 }
 
-- 
1.7.4.1

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