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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2021-12-30 18:02:59 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-12-30 19:44:07 +0300
commit02758cb20dff4852e5dceed6e828f9a2eb34d6e4 (patch)
tree00dae64f178912d66119a1537001e66e2e7871a6 /drivers/counter/ti-eqep.c
parente75d678d041fe55c7289e2a3d36de9c4f0abbf97 (diff)
downloadlinux-02758cb20dff4852e5dceed6e828f9a2eb34d6e4.tar.xz
counter: ti-eqep: Convert to new counter registration
This fixes device lifetime issues where it was possible to free a live struct device. Fixes: f213729f6796 ("counter: new TI eQEP driver") Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Acked-by: David Lechner <david@lechnology.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20211230150300.72196-23-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/counter/ti-eqep.c')
-rw-r--r--drivers/counter/ti-eqep.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/drivers/counter/ti-eqep.c b/drivers/counter/ti-eqep.c
index 2c70b900a6cf..0489d26eb47c 100644
--- a/drivers/counter/ti-eqep.c
+++ b/drivers/counter/ti-eqep.c
@@ -373,13 +373,15 @@ static const struct regmap_config ti_eqep_regmap16_config = {
static int ti_eqep_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct counter_device *counter;
struct ti_eqep_cnt *priv;
void __iomem *base;
int err;
- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
+ counter = devm_counter_alloc(dev, sizeof(*priv));
+ if (!counter)
return -ENOMEM;
+ priv = counter_priv(counter);
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
@@ -395,16 +397,15 @@ static int ti_eqep_probe(struct platform_device *pdev)
if (IS_ERR(priv->regmap16))
return PTR_ERR(priv->regmap16);
- priv->counter.name = dev_name(dev);
- priv->counter.parent = dev;
- priv->counter.ops = &ti_eqep_counter_ops;
- priv->counter.counts = ti_eqep_counts;
- priv->counter.num_counts = ARRAY_SIZE(ti_eqep_counts);
- priv->counter.signals = ti_eqep_signals;
- priv->counter.num_signals = ARRAY_SIZE(ti_eqep_signals);
- priv->counter.priv = priv;
+ counter->name = dev_name(dev);
+ counter->parent = dev;
+ counter->ops = &ti_eqep_counter_ops;
+ counter->counts = ti_eqep_counts;
+ counter->num_counts = ARRAY_SIZE(ti_eqep_counts);
+ counter->signals = ti_eqep_signals;
+ counter->num_signals = ARRAY_SIZE(ti_eqep_signals);
- platform_set_drvdata(pdev, priv);
+ platform_set_drvdata(pdev, counter);
/*
* Need to make sure power is turned on. On AM33xx, this comes from the
@@ -414,7 +415,7 @@ static int ti_eqep_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
- err = counter_register(&priv->counter);
+ err = counter_add(counter);
if (err < 0) {
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
@@ -426,10 +427,10 @@ static int ti_eqep_probe(struct platform_device *pdev)
static int ti_eqep_remove(struct platform_device *pdev)
{
- struct ti_eqep_cnt *priv = platform_get_drvdata(pdev);
+ struct counter_device *counter = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
- counter_unregister(&priv->counter);
+ counter_unregister(counter);
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);