From 02758cb20dff4852e5dceed6e828f9a2eb34d6e4 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Thu, 30 Dec 2021 16:02:59 +0100 Subject: [PATCH] counter: ti-eqep: Convert to new counter registration MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Acked-by: William Breathitt Gray Acked-by: David Lechner Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20211230150300.72196-23-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/counter/ti-eqep.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/counter/ti-eqep.c b/drivers/counter/ti-eqep.c index 2c70b90..0489d26 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); -- 2.7.4