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| author | Guenter Roeck <linux@roeck-us.net> | 2015-12-26 01:01:43 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2015-12-29 20:36:03 +0100 |
| commit | 756d1e9247dff6d416b0c9e073247f5e808bb5fa (patch) | |
| tree | 2fd46296766a0249bfcd4722ec9e5d14c34cce43 | |
| parent | watchdog: Separate and maintain variables based on variable lifetime (diff) | |
| download | linux-756d1e9247dff6d416b0c9e073247f5e808bb5fa.tar.xz linux-756d1e9247dff6d416b0c9e073247f5e808bb5fa.zip | |
watchdog: da9052_wdt: Drop reference counting
Reference counting is now implemented in the watchdog core and no longer
required in watchdog drivers.
Since it was implememented a no-op, and since the local memory is allocated
with devm_kzalloc(), the reference counting code in the driver really did
not really work anyway, and this patch effectively fixes a bug which could
cause a crash on unloading if the watchdog device was still open.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
| -rw-r--r-- | drivers/watchdog/da9052_wdt.c | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/drivers/watchdog/da9052_wdt.c b/drivers/watchdog/da9052_wdt.c index 67e67977bd29..2fc19a32a320 100644 --- a/drivers/watchdog/da9052_wdt.c +++ b/drivers/watchdog/da9052_wdt.c @@ -31,7 +31,6 @@ struct da9052_wdt_data { struct watchdog_device wdt; struct da9052 *da9052; - struct kref kref; unsigned long jpast; }; @@ -51,10 +50,6 @@ static const struct { }; -static void da9052_wdt_release_resources(struct kref *r) -{ -} - static int da9052_wdt_set_timeout(struct watchdog_device *wdt_dev, unsigned int timeout) { @@ -104,20 +99,6 @@ static int da9052_wdt_set_timeout(struct watchdog_device *wdt_dev, return 0; } -static void da9052_wdt_ref(struct watchdog_device *wdt_dev) -{ - struct da9052_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev); - - kref_get(&driver_data->kref); -} - -static void da9052_wdt_unref(struct watchdog_device *wdt_dev) -{ - struct da9052_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev); - - kref_put(&driver_data->kref, da9052_wdt_release_resources); -} - static int da9052_wdt_start(struct watchdog_device *wdt_dev) { return da9052_wdt_set_timeout(wdt_dev, wdt_dev->timeout); @@ -170,8 +151,6 @@ static const struct watchdog_ops da9052_wdt_ops = { .stop = da9052_wdt_stop, .ping = da9052_wdt_ping, .set_timeout = da9052_wdt_set_timeout, - .ref = da9052_wdt_ref, - .unref = da9052_wdt_unref, }; @@ -198,8 +177,6 @@ static int da9052_wdt_probe(struct platform_device *pdev) da9052_wdt->parent = &pdev->dev; watchdog_set_drvdata(da9052_wdt, driver_data); - kref_init(&driver_data->kref); - ret = da9052_reg_update(da9052, DA9052_CONTROL_D_REG, DA9052_CONTROLD_TWDSCALE, 0); if (ret < 0) { @@ -225,7 +202,6 @@ static int da9052_wdt_remove(struct platform_device *pdev) struct da9052_wdt_data *driver_data = platform_get_drvdata(pdev); watchdog_unregister_device(&driver_data->wdt); - kref_put(&driver_data->kref, da9052_wdt_release_resources); return 0; } |