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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-12-30 16:02:52 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-30 17:44:07 +0100 |
| commit | 9e884bb19ca84bbba179b8ccccb2694badd4150f (patch) | |
| tree | 21fd214de3f2220f0cbe22e024e1d8c3f1bf853a /drivers/counter | |
| parent | counter: Update documentation for new counter registration functions (diff) | |
| download | linux-9e884bb19ca84bbba179b8ccccb2694badd4150f.tar.xz linux-9e884bb19ca84bbba179b8ccccb2694badd4150f.zip | |
counter: 104-quad-8: Convert to new counter registration
This fixes device lifetime issues where it was possible to free a live
struct device.
Fixes: f1d8a071d45b ("counter: 104-quad-8: Add Generic Counter interface support")
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/20211230150300.72196-16-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/counter')
| -rw-r--r-- | drivers/counter/104-quad-8.c | 35 |
1 files changed, 20 insertions, 15 deletions
diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c index 41b4d6f4583c..1fbb3923797c 100644 --- a/drivers/counter/104-quad-8.c +++ b/drivers/counter/104-quad-8.c @@ -52,7 +52,6 @@ MODULE_PARM_DESC(irq, "ACCES 104-QUAD-8 interrupt line numbers"); */ struct quad8 { spinlock_t lock; - struct counter_device counter; unsigned int fck_prescaler[QUAD8_NUM_COUNTERS]; unsigned int preset[QUAD8_NUM_COUNTERS]; unsigned int count_mode[QUAD8_NUM_COUNTERS]; @@ -1083,7 +1082,8 @@ static struct counter_count quad8_counts[] = { static irqreturn_t quad8_irq_handler(int irq, void *private) { - struct quad8 *const priv = private; + struct counter_device *counter = private; + struct quad8 *const priv = counter_priv(counter); const unsigned long base = priv->base; unsigned long irq_status; unsigned long channel; @@ -1114,7 +1114,7 @@ static irqreturn_t quad8_irq_handler(int irq, void *private) continue; } - counter_push_event(&priv->counter, event, channel); + counter_push_event(counter, event, channel); } /* Clear pending interrupts on device */ @@ -1125,6 +1125,7 @@ static irqreturn_t quad8_irq_handler(int irq, void *private) static int quad8_probe(struct device *dev, unsigned int id) { + struct counter_device *counter; struct quad8 *priv; int i, j; unsigned int base_offset; @@ -1136,19 +1137,19 @@ static int quad8_probe(struct device *dev, unsigned int id) return -EBUSY; } - 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); /* Initialize Counter device and driver data */ - priv->counter.name = dev_name(dev); - priv->counter.parent = dev; - priv->counter.ops = &quad8_ops; - priv->counter.counts = quad8_counts; - priv->counter.num_counts = ARRAY_SIZE(quad8_counts); - priv->counter.signals = quad8_signals; - priv->counter.num_signals = ARRAY_SIZE(quad8_signals); - priv->counter.priv = priv; + counter->name = dev_name(dev); + counter->parent = dev; + counter->ops = &quad8_ops; + counter->counts = quad8_counts; + counter->num_counts = ARRAY_SIZE(quad8_counts); + counter->signals = quad8_signals; + counter->num_signals = ARRAY_SIZE(quad8_signals); priv->base = base[id]; spin_lock_init(&priv->lock); @@ -1188,11 +1189,15 @@ static int quad8_probe(struct device *dev, unsigned int id) outb(QUAD8_CHAN_OP_ENABLE_INTERRUPT_FUNC, base[id] + QUAD8_REG_CHAN_OP); err = devm_request_irq(dev, irq[id], quad8_irq_handler, IRQF_SHARED, - priv->counter.name, priv); + counter->name, counter); if (err) return err; - return devm_counter_register(dev, &priv->counter); + err = devm_counter_add(dev, counter); + if (err < 0) + return dev_err_probe(dev, err, "Failed to add counter\n"); + + return 0; } static struct isa_driver quad8_driver = { |