linux-kernel - [PATCH 3.12 137/142] mmc: sh_mmcif: Fix timeout value for command request

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Message-Id: <386484aac9a72283e58488159d0c9c76d9cf50d6.1431761807.git.jslaby@suse.cz>
Date:	Sat, 16 May 2015 09:38:17 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Takeshi Kihara <takeshi.kihara.df@...esas.com>,
	Simon Horman <horms+renesas@...ge.net.au>,
	Yoshihiro Kaneko <ykaneko0929@...il.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 137/142] mmc: sh_mmcif: Fix timeout value for command request

From: Takeshi Kihara <takeshi.kihara.df@...esas.com>

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

===============

commit bad4371d87d1d1ed1aecd9c9cc21c41ac3f289c8 upstream.

f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
changed the timeout value from 1000 jiffies to 1s. In the case where
HZ is 1000 the values are the same. However, for smaller HZ values the
timeout is now smaller, 1s instead of 10s in the case of HZ=100.

Since the timeout occurs in spite of a normal data transfer a timeout of
10s seems more appropriate. This restores the previous timeout in the
case where HZ=100 and results in an increase over the previous timeout
for larger values of HZ.

Fixes: f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@...esas.com>
[horms: rewrote changelog to refer to HZ]
Signed-off-by: Simon Horman <horms+renesas@...ge.net.au>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@...il.com>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/mmc/host/sh_mmcif.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 36629a024aa1..5b4f1e163e00 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -1399,7 +1399,7 @@ static int sh_mmcif_probe(struct platform_device *pdev)
 	host		= mmc_priv(mmc);
 	host->mmc	= mmc;
 	host->addr	= reg;
-	host->timeout	= msecs_to_jiffies(1000);
+	host->timeout	= msecs_to_jiffies(10000);
 	host->ccs_enable = !pd || !pd->ccs_unsupported;
 	host->clk_ctrl2_enable = pd && pd->clk_ctrl2_present;
 
-- 
2.3.7

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