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81 lines
2.5 KiB
Diff
81 lines
2.5 KiB
Diff
From 43f676ace2e0591718ff493d290bc49b35ec2ffc Mon Sep 17 00:00:00 2001
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From: Guenter Roeck <linux@roeck-us.net>
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Date: Fri, 25 Dec 2015 16:01:44 -0800
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Subject: watchdog: da9055_wdt: Drop reference counting
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Reference counting is now implemented in the watchdog core and no longer
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required in watchdog drivers.
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Since it was implememented a no-op, and since the local memory is allocated
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with devm_kzalloc(), the reference counting code in the driver really did
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not really work anyway, and this patch effectively fixes a bug which could
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cause a crash on unloading if the watchdog device was still open.
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Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
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---
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drivers/watchdog/da9055_wdt.c | 24 ------------------------
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1 file changed, 24 deletions(-)
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--- a/drivers/watchdog/da9055_wdt.c
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+++ b/drivers/watchdog/da9055_wdt.c
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@@ -35,7 +35,6 @@ MODULE_PARM_DESC(nowayout,
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struct da9055_wdt_data {
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struct watchdog_device wdt;
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struct da9055 *da9055;
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- struct kref kref;
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};
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static const struct {
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@@ -99,24 +98,6 @@ static int da9055_wdt_ping(struct watchd
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DA9055_WATCHDOG_MASK, 1);
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}
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-static void da9055_wdt_release_resources(struct kref *r)
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-{
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-}
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-
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-static void da9055_wdt_ref(struct watchdog_device *wdt_dev)
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-{
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- struct da9055_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev);
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-
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- kref_get(&driver_data->kref);
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-}
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-
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-static void da9055_wdt_unref(struct watchdog_device *wdt_dev)
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-{
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- struct da9055_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev);
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-
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- kref_put(&driver_data->kref, da9055_wdt_release_resources);
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-}
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-
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static int da9055_wdt_start(struct watchdog_device *wdt_dev)
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{
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return da9055_wdt_set_timeout(wdt_dev, wdt_dev->timeout);
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@@ -138,8 +119,6 @@ static const struct watchdog_ops da9055_
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.stop = da9055_wdt_stop,
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.ping = da9055_wdt_ping,
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.set_timeout = da9055_wdt_set_timeout,
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- .ref = da9055_wdt_ref,
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- .unref = da9055_wdt_unref,
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};
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static int da9055_wdt_probe(struct platform_device *pdev)
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@@ -165,8 +144,6 @@ static int da9055_wdt_probe(struct platf
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watchdog_set_nowayout(da9055_wdt, nowayout);
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watchdog_set_drvdata(da9055_wdt, driver_data);
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- kref_init(&driver_data->kref);
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-
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ret = da9055_wdt_stop(da9055_wdt);
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if (ret < 0) {
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dev_err(&pdev->dev, "Failed to stop watchdog, %d\n", ret);
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@@ -189,7 +166,6 @@ static int da9055_wdt_remove(struct plat
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struct da9055_wdt_data *driver_data = platform_get_drvdata(pdev);
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watchdog_unregister_device(&driver_data->wdt);
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- kref_put(&driver_data->kref, da9055_wdt_release_resources);
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return 0;
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}
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