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

From: Tomas Winkler
Date: Sun Aug 25 2013 - 05:52:47 EST


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@xxxxxxxxxxxxxxx
Tested-by: Shuah Khan <shuah.kh@xxxxxxxxxxx>
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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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