linux-kernel - [3.10][PATCH 3/4] mei: me: fix waiting for hw ready

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Message-Id: <1377424189-5508-4-git-send-email-tomas.winkler@intel.com>
Date:	Sun, 25 Aug 2013 12:49:48 +0300
From:	Tomas Winkler <tomas.winkler@...el.com>
To:	gregkh@...uxfoundation.org
Cc:	arnd@...db.de, linux-kernel@...r.kernel.org,
	Tomas Winkler <tomas.winkler@...el.com>, stable@...r.kernel.org
Subject: [3.10][PATCH 3/4] mei: me: fix waiting for hw ready

stable: 3.10
commit dab9bf41b23fe700c4a74133e41eb6a21706031e upstream


1. MEI_INTEROP_TIMEOUT is in seconds not in jiffies
so we use mei_secs_to_jiffies macro
While cold boot is fast this is relevant in resume
2. wait_event_interruptible_timeout can return with
-ERESTARTSYS so do not override it with -ETIMEDOUT
3.Adjust error message

Cc: stable@...r.kernel.org
Tested-by: Shuah Khan <shuah.kh@...sung.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/misc/mei/hw-me.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 0310859..700fe55 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -238,14 +238,18 @@ static int mei_me_hw_ready_wait(struct mei_device *dev)
 	if (mei_me_hw_is_ready(dev))
 		return 0;
 
+	dev->recvd_hw_ready = false;
 	mutex_unlock(&dev->device_lock);
 	err = wait_event_interruptible_timeout(dev->wait_hw_ready,
-			dev->recvd_hw_ready, MEI_INTEROP_TIMEOUT);
+			dev->recvd_hw_ready,
+			mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT));
 	mutex_lock(&dev->device_lock);
 	if (!err && !dev->recvd_hw_ready) {
+		if (!err)
+			err = -ETIMEDOUT;
 		dev_err(&dev->pdev->dev,
-			"wait hw ready failed. status = 0x%x\n", err);
-		return -ETIMEDOUT;
+			"wait hw ready failed. status = %d\n", err);
+		return err;
 	}
 
 	dev->recvd_hw_ready = false;
-- 
1.8.1.2

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