forked from Minki/linux
watchdog: watchdog_dev: Use single variable name for struct watchdog_device
The current code uses 'wdd', wddev', and 'watchdog' as variable names for struct watchdog_device. This is confusing and makes it difficult to enhance the code. Replace it all with 'wdd'. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: Timo Kokkonen <timo.kokkonen@offcode.fi> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Guenter Roeck
Wim Van Sebroeck
parent
1e93594911
commit
bc794ac3b5
@ -51,7 +51,7 @@ static struct watchdog_device *old_wdd;
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/*
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* watchdog_ping: ping the watchdog.
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* @wddev: the watchdog device to ping
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* @wdd: the watchdog device to ping
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*
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* If the watchdog has no own ping operation then it needs to be
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* restarted via the start operation. This wrapper function does
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@ -59,65 +59,65 @@ static struct watchdog_device *old_wdd;
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* We only ping when the watchdog device is running.
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*/
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static int watchdog_ping(struct watchdog_device *wddev)
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static int watchdog_ping(struct watchdog_device *wdd)
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{
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int err = 0;
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mutex_lock(&wddev->lock);
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mutex_lock(&wdd->lock);
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if (test_bit(WDOG_UNREGISTERED, &wddev->status)) {
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if (test_bit(WDOG_UNREGISTERED, &wdd->status)) {
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err = -ENODEV;
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goto out_ping;
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}
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if (!watchdog_active(wddev))
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if (!watchdog_active(wdd))
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goto out_ping;
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if (wddev->ops->ping)
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err = wddev->ops->ping(wddev); /* ping the watchdog */
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if (wdd->ops->ping)
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err = wdd->ops->ping(wdd); /* ping the watchdog */
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else
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err = wddev->ops->start(wddev); /* restart watchdog */
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err = wdd->ops->start(wdd); /* restart watchdog */
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out_ping:
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mutex_unlock(&wddev->lock);
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mutex_unlock(&wdd->lock);
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return err;
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}
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/*
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* watchdog_start: wrapper to start the watchdog.
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* @wddev: the watchdog device to start
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* @wdd: the watchdog device to start
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*
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* Start the watchdog if it is not active and mark it active.
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* This function returns zero on success or a negative errno code for
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* failure.
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*/
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static int watchdog_start(struct watchdog_device *wddev)
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static int watchdog_start(struct watchdog_device *wdd)
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{
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int err = 0;
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mutex_lock(&wddev->lock);
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mutex_lock(&wdd->lock);
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if (test_bit(WDOG_UNREGISTERED, &wddev->status)) {
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if (test_bit(WDOG_UNREGISTERED, &wdd->status)) {
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err = -ENODEV;
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goto out_start;
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}
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if (watchdog_active(wddev))
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if (watchdog_active(wdd))
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goto out_start;
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err = wddev->ops->start(wddev);
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err = wdd->ops->start(wdd);
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if (err == 0)
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set_bit(WDOG_ACTIVE, &wddev->status);
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set_bit(WDOG_ACTIVE, &wdd->status);
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out_start:
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mutex_unlock(&wddev->lock);
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mutex_unlock(&wdd->lock);
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return err;
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}
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/*
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* watchdog_stop: wrapper to stop the watchdog.
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* @wddev: the watchdog device to stop
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* @wdd: the watchdog device to stop
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*
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* Stop the watchdog if it is still active and unmark it active.
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* This function returns zero on success or a negative errno code for
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@ -125,155 +125,154 @@ out_start:
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* If the 'nowayout' feature was set, the watchdog cannot be stopped.
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*/
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static int watchdog_stop(struct watchdog_device *wddev)
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static int watchdog_stop(struct watchdog_device *wdd)
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{
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int err = 0;
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mutex_lock(&wddev->lock);
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mutex_lock(&wdd->lock);
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if (test_bit(WDOG_UNREGISTERED, &wddev->status)) {
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if (test_bit(WDOG_UNREGISTERED, &wdd->status)) {
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err = -ENODEV;
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goto out_stop;
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}
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if (!watchdog_active(wddev))
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if (!watchdog_active(wdd))
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goto out_stop;
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if (test_bit(WDOG_NO_WAY_OUT, &wddev->status)) {
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dev_info(wddev->dev, "nowayout prevents watchdog being stopped!\n");
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if (test_bit(WDOG_NO_WAY_OUT, &wdd->status)) {
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dev_info(wdd->dev, "nowayout prevents watchdog being stopped!\n");
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err = -EBUSY;
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goto out_stop;
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}
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err = wddev->ops->stop(wddev);
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err = wdd->ops->stop(wdd);
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if (err == 0)
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clear_bit(WDOG_ACTIVE, &wddev->status);
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clear_bit(WDOG_ACTIVE, &wdd->status);
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out_stop:
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mutex_unlock(&wddev->lock);
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mutex_unlock(&wdd->lock);
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return err;
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}
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/*
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* watchdog_get_status: wrapper to get the watchdog status
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* @wddev: the watchdog device to get the status from
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* @wdd: the watchdog device to get the status from
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* @status: the status of the watchdog device
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*
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* Get the watchdog's status flags.
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*/
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static int watchdog_get_status(struct watchdog_device *wddev,
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static int watchdog_get_status(struct watchdog_device *wdd,
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unsigned int *status)
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{
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int err = 0;
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*status = 0;
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if (!wddev->ops->status)
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if (!wdd->ops->status)
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return -EOPNOTSUPP;
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mutex_lock(&wddev->lock);
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mutex_lock(&wdd->lock);
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if (test_bit(WDOG_UNREGISTERED, &wddev->status)) {
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if (test_bit(WDOG_UNREGISTERED, &wdd->status)) {
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err = -ENODEV;
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goto out_status;
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}
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*status = wddev->ops->status(wddev);
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*status = wdd->ops->status(wdd);
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out_status:
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mutex_unlock(&wddev->lock);
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mutex_unlock(&wdd->lock);
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return err;
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}
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/*
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* watchdog_set_timeout: set the watchdog timer timeout
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* @wddev: the watchdog device to set the timeout for
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* @wdd: the watchdog device to set the timeout for
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* @timeout: timeout to set in seconds
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*/
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static int watchdog_set_timeout(struct watchdog_device *wddev,
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static int watchdog_set_timeout(struct watchdog_device *wdd,
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unsigned int timeout)
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{
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int err;
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if ((wddev->ops->set_timeout == NULL) ||
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!(wddev->info->options & WDIOF_SETTIMEOUT))
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if (!wdd->ops->set_timeout || !(wdd->info->options & WDIOF_SETTIMEOUT))
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return -EOPNOTSUPP;
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if (watchdog_timeout_invalid(wddev, timeout))
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if (watchdog_timeout_invalid(wdd, timeout))
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return -EINVAL;
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mutex_lock(&wddev->lock);
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mutex_lock(&wdd->lock);
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if (test_bit(WDOG_UNREGISTERED, &wddev->status)) {
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if (test_bit(WDOG_UNREGISTERED, &wdd->status)) {
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err = -ENODEV;
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goto out_timeout;
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}
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err = wddev->ops->set_timeout(wddev, timeout);
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err = wdd->ops->set_timeout(wdd, timeout);
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out_timeout:
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mutex_unlock(&wddev->lock);
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mutex_unlock(&wdd->lock);
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return err;
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}
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/*
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* watchdog_get_timeleft: wrapper to get the time left before a reboot
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* @wddev: the watchdog device to get the remaining time from
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* @wdd: the watchdog device to get the remaining time from
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* @timeleft: the time that's left
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*
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* Get the time before a watchdog will reboot (if not pinged).
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*/
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static int watchdog_get_timeleft(struct watchdog_device *wddev,
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static int watchdog_get_timeleft(struct watchdog_device *wdd,
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unsigned int *timeleft)
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{
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int err = 0;
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*timeleft = 0;
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if (!wddev->ops->get_timeleft)
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if (!wdd->ops->get_timeleft)
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return -EOPNOTSUPP;
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mutex_lock(&wddev->lock);
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mutex_lock(&wdd->lock);
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if (test_bit(WDOG_UNREGISTERED, &wddev->status)) {
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if (test_bit(WDOG_UNREGISTERED, &wdd->status)) {
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err = -ENODEV;
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goto out_timeleft;
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}
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*timeleft = wddev->ops->get_timeleft(wddev);
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*timeleft = wdd->ops->get_timeleft(wdd);
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out_timeleft:
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mutex_unlock(&wddev->lock);
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mutex_unlock(&wdd->lock);
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return err;
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}
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/*
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* watchdog_ioctl_op: call the watchdog drivers ioctl op if defined
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* @wddev: the watchdog device to do the ioctl on
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* @wdd: the watchdog device to do the ioctl on
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* @cmd: watchdog command
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* @arg: argument pointer
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*/
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static int watchdog_ioctl_op(struct watchdog_device *wddev, unsigned int cmd,
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static int watchdog_ioctl_op(struct watchdog_device *wdd, unsigned int cmd,
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unsigned long arg)
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{
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int err;
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if (!wddev->ops->ioctl)
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if (!wdd->ops->ioctl)
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return -ENOIOCTLCMD;
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mutex_lock(&wddev->lock);
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mutex_lock(&wdd->lock);
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if (test_bit(WDOG_UNREGISTERED, &wddev->status)) {
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if (test_bit(WDOG_UNREGISTERED, &wdd->status)) {
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err = -ENODEV;
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goto out_ioctl;
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}
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err = wddev->ops->ioctl(wddev, cmd, arg);
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err = wdd->ops->ioctl(wdd, cmd, arg);
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out_ioctl:
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mutex_unlock(&wddev->lock);
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mutex_unlock(&wdd->lock);
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return err;
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}
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@ -513,43 +512,43 @@ static struct miscdevice watchdog_miscdev = {
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/*
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* watchdog_dev_register: register a watchdog device
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* @watchdog: watchdog device
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* @wdd: watchdog device
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*
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* Register a watchdog device including handling the legacy
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* /dev/watchdog node. /dev/watchdog is actually a miscdevice and
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* thus we set it up like that.
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*/
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int watchdog_dev_register(struct watchdog_device *watchdog)
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int watchdog_dev_register(struct watchdog_device *wdd)
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{
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int err, devno;
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if (watchdog->id == 0) {
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old_wdd = watchdog;
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watchdog_miscdev.parent = watchdog->parent;
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if (wdd->id == 0) {
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old_wdd = wdd;
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watchdog_miscdev.parent = wdd->parent;
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err = misc_register(&watchdog_miscdev);
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if (err != 0) {
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pr_err("%s: cannot register miscdev on minor=%d (err=%d).\n",
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watchdog->info->identity, WATCHDOG_MINOR, err);
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wdd->info->identity, WATCHDOG_MINOR, err);
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if (err == -EBUSY)
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pr_err("%s: a legacy watchdog module is probably present.\n",
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watchdog->info->identity);
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wdd->info->identity);
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old_wdd = NULL;
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return err;
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}
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}
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/* Fill in the data structures */
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devno = MKDEV(MAJOR(watchdog_devt), watchdog->id);
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cdev_init(&watchdog->cdev, &watchdog_fops);
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watchdog->cdev.owner = watchdog->ops->owner;
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devno = MKDEV(MAJOR(watchdog_devt), wdd->id);
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cdev_init(&wdd->cdev, &watchdog_fops);
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wdd->cdev.owner = wdd->ops->owner;
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/* Add the device */
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err = cdev_add(&watchdog->cdev, devno, 1);
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err = cdev_add(&wdd->cdev, devno, 1);
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if (err) {
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pr_err("watchdog%d unable to add device %d:%d\n",
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watchdog->id, MAJOR(watchdog_devt), watchdog->id);
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if (watchdog->id == 0) {
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wdd->id, MAJOR(watchdog_devt), wdd->id);
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if (wdd->id == 0) {
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misc_deregister(&watchdog_miscdev);
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old_wdd = NULL;
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}
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@ -564,14 +563,14 @@ int watchdog_dev_register(struct watchdog_device *watchdog)
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* Unregister the watchdog and if needed the legacy /dev/watchdog device.
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*/
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int watchdog_dev_unregister(struct watchdog_device *watchdog)
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int watchdog_dev_unregister(struct watchdog_device *wdd)
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{
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mutex_lock(&watchdog->lock);
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set_bit(WDOG_UNREGISTERED, &watchdog->status);
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mutex_unlock(&watchdog->lock);
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mutex_lock(&wdd->lock);
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set_bit(WDOG_UNREGISTERED, &wdd->status);
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mutex_unlock(&wdd->lock);
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cdev_del(&watchdog->cdev);
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if (watchdog->id == 0) {
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cdev_del(&wdd->cdev);
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if (wdd->id == 0) {
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misc_deregister(&watchdog_miscdev);
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old_wdd = NULL;
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}
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