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@xxxxxxxxxxxx>
---
v2: Add note that the patch also fixes a bug.
drivers/watchdog/da9055_wdt.c | 24 ------------------------
1 file changed, 24 deletions(-)
diff --git a/drivers/watchdog/da9055_wdt.c b/drivers/watchdog/da9055_wdt.c
index 04d1430d93d2..8377c43f3f20 100644
--- a/drivers/watchdog/da9055_wdt.c
+++ b/drivers/watchdog/da9055_wdt.c
@@ -35,7 +35,6 @@ MODULE_PARM_DESC(nowayout,
struct da9055_wdt_data {
struct watchdog_device wdt;
struct da9055 *da9055;
- struct kref kref;
};
static const struct {
@@ -99,24 +98,6 @@ static int da9055_wdt_ping(struct watchdog_device *wdt_dev)
DA9055_WATCHDOG_MASK, 1);
}
-static void da9055_wdt_release_resources(struct kref *r)
-{
-}
-
-static void da9055_wdt_ref(struct watchdog_device *wdt_dev)
-{
- struct da9055_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev);
-
- kref_get(&driver_data->kref);
-}
-
-static void da9055_wdt_unref(struct watchdog_device *wdt_dev)
-{
- struct da9055_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev);
-
- kref_put(&driver_data->kref, da9055_wdt_release_resources);
-}
-
static int da9055_wdt_start(struct watchdog_device *wdt_dev)
{
return da9055_wdt_set_timeout(wdt_dev, wdt_dev->timeout);
@@ -138,8 +119,6 @@ static const struct watchdog_ops da9055_wdt_ops = {
.stop = da9055_wdt_stop,
.ping = da9055_wdt_ping,
.set_timeout = da9055_wdt_set_timeout,
- .ref = da9055_wdt_ref,
- .unref = da9055_wdt_unref,
};
static int da9055_wdt_probe(struct platform_device *pdev)
@@ -165,8 +144,6 @@ static int da9055_wdt_probe(struct platform_device *pdev)
watchdog_set_nowayout(da9055_wdt, nowayout);
watchdog_set_drvdata(da9055_wdt, driver_data);
- kref_init(&driver_data->kref);
-
ret = da9055_wdt_stop(da9055_wdt);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to stop watchdog, %d\n", ret);
@@ -189,7 +166,6 @@ static int da9055_wdt_remove(struct platform_device *pdev)
struct da9055_wdt_data *driver_data = platform_get_drvdata(pdev);
watchdog_unregister_device(&driver_data->wdt);
- kref_put(&driver_data->kref, da9055_wdt_release_resources);
return 0;
}
--
2.1.4
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