diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2014-02-19 19:35:51 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-01 03:15:57 +0400 |
| commit | 5877255dc57403f49b4961070b206b832c931201 (patch) | |
| tree | 17dd74aa0d9e00ee41a8674cd593707effc02f28 | |
| parent | b6d81fd66155fb6d0965502e146b136047e428b3 (diff) | |
| download | linux-5877255dc57403f49b4961070b206b832c931201.tar.xz | |
mei: wd: fix stop completion failure
While running Documentation/watchdog/src/watchdog-simple.c
and quiting by Ctrl-C, fallowing error is displayed:
mei_me 0000:00:16.0: wd: stop failed to complete ret=-512.
The whatchdog core framework is not able to propagate
-ESYSRESTART or -EINTR. Also There is no much sense in
restarting the close system call so instead of using
wait_event_interruptible_timeout we can use wait_event_timeout
with reasonable 10 msecs timeout.
Reported-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/mei/interrupt.c | 2 | ||||
| -rw-r--r-- | drivers/misc/mei/wd.c | 32 |
2 files changed, 18 insertions, 16 deletions
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 834220af814f..5aab335f585b 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -474,7 +474,7 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) if (dev->wd_state == MEI_WD_STOPPING) { dev->wd_state = MEI_WD_IDLE; - wake_up_interruptible(&dev->wait_stop_wd); + wake_up(&dev->wait_stop_wd); } if (mei_cl_is_connected(&dev->wd_cl)) { diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c index 13bb7a91ae12..e084adf27259 100644 --- a/drivers/misc/mei/wd.c +++ b/drivers/misc/mei/wd.c @@ -155,9 +155,11 @@ int mei_wd_send(struct mei_device *dev) * @dev: the device structure * @preserve: indicate if to keep the timeout value * - * returns 0 if success, - * -EIO when message send fails + * returns 0 if success + * on error: + * -EIO when message send fails * -EINVAL when invalid message is to be sent + * -ETIME on message timeout */ int mei_wd_stop(struct mei_device *dev) { @@ -173,12 +175,12 @@ int mei_wd_stop(struct mei_device *dev) ret = mei_cl_flow_ctrl_creds(&dev->wd_cl); if (ret < 0) - goto out; + goto err; if (ret && mei_hbuf_acquire(dev)) { ret = mei_wd_send(dev); if (ret) - goto out; + goto err; dev->wd_pending = false; } else { dev->wd_pending = true; @@ -186,21 +188,21 @@ int mei_wd_stop(struct mei_device *dev) mutex_unlock(&dev->device_lock); - ret = wait_event_interruptible_timeout(dev->wait_stop_wd, - dev->wd_state == MEI_WD_IDLE, - msecs_to_jiffies(MEI_WD_STOP_TIMEOUT)); + ret = wait_event_timeout(dev->wait_stop_wd, + dev->wd_state == MEI_WD_IDLE, + msecs_to_jiffies(MEI_WD_STOP_TIMEOUT)); mutex_lock(&dev->device_lock); - if (dev->wd_state == MEI_WD_IDLE) { - dev_dbg(&dev->pdev->dev, "wd: stop completed ret=%d.\n", ret); - ret = 0; - } else { - if (!ret) - ret = -ETIME; + if (dev->wd_state != MEI_WD_IDLE) { + /* timeout */ + ret = -ETIME; dev_warn(&dev->pdev->dev, "wd: stop failed to complete ret=%d.\n", ret); + goto err; } - -out: + dev_dbg(&dev->pdev->dev, "wd: stop completed after %u msec\n", + MEI_WD_STOP_TIMEOUT - jiffies_to_msecs(ret)); + return 0; +err: return ret; } |