linux-kernel - [ 087/117] i2c-eg20t: change timeout value 50msec to 1000msec

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Date:	Mon, 28 May 2012 04:13:29 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Tomoya MORINAGA <tomoya.rohm@...il.com>,
	Wolfram Sang <w.sang@...gutronix.de>
Subject: [ 087/117] i2c-eg20t: change timeout value 50msec to 1000msec

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tomoya MORINAGA <tomoya.rohm@...il.com>

commit 8a52f9f347da721b199b7f9dcc0168bbe7d0baae upstream.

Currently, during i2c works alone, wait-event timeout is not occurred.
However, as CPU load increases, timeout occurs frequently.
So, I modified like this patch.
Modifying like this patch, I've never seen the timeout event with high
load test.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com>
Signed-off-by: Wolfram Sang <w.sang@...gutronix.de>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/i2c/busses/i2c-eg20t.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index f086131..4a46c8b 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -324,7 +324,7 @@ static s32 pch_i2c_wait_for_xfer_complete(struct i2c_algo_pch_data *adap)
 {
 	long ret;
 	ret = wait_event_timeout(pch_event,
-			(adap->pch_event_flag != 0), msecs_to_jiffies(50));
+			(adap->pch_event_flag != 0), msecs_to_jiffies(1000));
 
 	if (ret == 0) {
 		pch_err(adap, "timeout: %x\n", adap->pch_event_flag);


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