diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-12-30 16:02:53 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-30 17:44:07 +0100 |
| commit | aefc7e1797243eaa7a5e03629819d4aaa3c3feae (patch) | |
| tree | 463505d2787b972acdca1aa8e220b86f6e8e5a2a | |
| parent | 9e884bb19ca84bbba179b8ccccb2694badd4150f (diff) | |
| download | linux-aefc7e1797243eaa7a5e03629819d4aaa3c3feae.tar.bz2 | |
counter: interrupt-cnt: Convert to new counter registration
This fixes device lifetime issues where it was possible to free a live
struct device.
Fixes: a55ebd47f21f ("counter: add IRQ or GPIO based counter")
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20211230150300.72196-17-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/counter/interrupt-cnt.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/counter/interrupt-cnt.c b/drivers/counter/interrupt-cnt.c index 4bf706ef46e2..9e99702470c2 100644 --- a/drivers/counter/interrupt-cnt.c +++ b/drivers/counter/interrupt-cnt.c @@ -16,7 +16,6 @@ struct interrupt_cnt_priv { atomic_t count; - struct counter_device counter; struct gpio_desc *gpio; int irq; bool enabled; @@ -148,12 +147,14 @@ static const struct counter_ops interrupt_cnt_ops = { static int interrupt_cnt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct counter_device *counter; struct interrupt_cnt_priv *priv; int ret; - 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); priv->irq = platform_get_irq_optional(pdev, 0); if (priv->irq == -ENXIO) @@ -184,8 +185,8 @@ static int interrupt_cnt_probe(struct platform_device *pdev) if (!priv->signals.name) return -ENOMEM; - priv->counter.signals = &priv->signals; - priv->counter.num_signals = 1; + counter->signals = &priv->signals; + counter->num_signals = 1; priv->synapses.actions_list = interrupt_cnt_synapse_actions; priv->synapses.num_actions = ARRAY_SIZE(interrupt_cnt_synapse_actions); @@ -199,12 +200,11 @@ static int interrupt_cnt_probe(struct platform_device *pdev) priv->cnts.ext = interrupt_cnt_ext; priv->cnts.num_ext = ARRAY_SIZE(interrupt_cnt_ext); - priv->counter.priv = priv; - priv->counter.name = dev_name(dev); - priv->counter.parent = dev; - priv->counter.ops = &interrupt_cnt_ops; - priv->counter.counts = &priv->cnts; - priv->counter.num_counts = 1; + counter->name = dev_name(dev); + counter->parent = dev; + counter->ops = &interrupt_cnt_ops; + counter->counts = &priv->cnts; + counter->num_counts = 1; irq_set_status_flags(priv->irq, IRQ_NOAUTOEN); ret = devm_request_irq(dev, priv->irq, interrupt_cnt_isr, @@ -213,7 +213,11 @@ static int interrupt_cnt_probe(struct platform_device *pdev) if (ret) return ret; - return devm_counter_register(dev, &priv->counter); + ret = devm_counter_add(dev, counter); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to add counter\n"); + + return 0; } static const struct of_device_id interrupt_cnt_of_match[] = { |