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Subject[staging] staging/mei: fix suspend failure
Date
wait_event_interruptible_timeout return value was wrongly used.
The remaining timeout was used as the error code.
This fix translated wait_event_interruptible_timeout return value
into error code that can be propagated.

[10291.674121] pci_pm_suspend(): mei_pci_suspend+0x0/0x8b [mei] returns 2500
It's thinkpad t400 with
00:03.0 Communication controller [0780]: Intel Corporation Mobile 4 Series Chipset MEI Controller [8086:2a44] (rev 07)

Reported-by: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
drivers/staging/mei/init.c | 2 +-
drivers/staging/mei/wd.c | 13 +++++++++----
2 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/mei/init.c b/drivers/staging/mei/init.c
index eb70e70..0fa8216 100644
--- a/drivers/staging/mei/init.c
+++ b/drivers/staging/mei/init.c
@@ -185,7 +185,7 @@ int mei_hw_init(struct mei_device *dev)
mutex_lock(&dev->device_lock);
}

- if (!err && !dev->recvd_msg) {
+ if (err <= 0 && !dev->recvd_msg) {
dev->mei_state = MEI_DISABLED;
dev_dbg(&dev->pdev->dev,
"wait_event_interruptible_timeout failed"
diff --git a/drivers/staging/mei/wd.c b/drivers/staging/mei/wd.c
index 18516a8..42f04ef 100644
--- a/drivers/staging/mei/wd.c
+++ b/drivers/staging/mei/wd.c
@@ -169,10 +169,15 @@ int mei_wd_stop(struct mei_device *dev, bool preserve)
ret = wait_event_interruptible_timeout(dev->wait_stop_wd,
dev->wd_stopped, 10 * HZ);
mutex_lock(&dev->device_lock);
- if (!dev->wd_stopped)
- dev_dbg(&dev->pdev->dev, "stop wd failed to complete.\n");
- else
- dev_dbg(&dev->pdev->dev, "stop wd complete.\n");
+ if (dev->wd_stopped) {
+ dev_dbg(&dev->pdev->dev, "stop wd complete ret=%d.\n", ret);
+ ret = 0;
+ } else {
+ if (!ret)
+ ret = -ETIMEDOUT;
+ dev_warn(&dev->pdev->dev,
+ "stop wd failed to complete ret=%d.\n", ret);
+ }

if (preserve)
dev->wd_timeout = wd_timeout;
--
1.7.4.4
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