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| author |  Guenter Roeck <linux@roeck-us.net>
| 2017-01-25 14:21:10 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net>
| 2017-02-24 14:00:23 -0800 |
| commit | bb292ac1c6028344013309a309b44dc691581825 (patch) | |
| tree | b4f36b0a8cf8a8c23026c1f12c2719bd96f53d55 /drivers/watchdog | |
| parent | watchdog: ebc-c384_wdt: Utilize devm_ functions in driver probe callback (diff) | |
| download | linux-bb292ac1c6028344013309a309b44dc691581825.tar.gz linux-bb292ac1c6028344013309a309b44dc691581825.tar.bz2 linux-bb292ac1c6028344013309a309b44dc691581825.zip | |
watchdog: Introduce watchdog_stop_on_unregister helper
Many watchdog drivers explicitly stop the watchdog when unregistering it.
While it is unclear if this is actually needed (the whatdog should not be
running at that time if it can be stopped), introduce a helper to
explicitly stop the watchdog in the watchdog core when unregistering it.
This helps reducing driver code size while retaining functionality.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/watchdog_dev.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 32930a073a12..d5d2bbd8f428 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -987,6 +987,11 @@ static void watchdog_cdev_unregister(struct watchdog_device *wdd) wdd->wd_data = NULL; mutex_unlock(&wd_data->lock); + if (watchdog_active(wdd) && + test_bit(WDOG_STOP_ON_UNREGISTER, &wdd->status)) { + watchdog_stop(wdd); + } + cancel_delayed_work_sync(&wd_data->work); kref_put(&wd_data->kref, watchdog_core_data_release); |