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Subject[PATCH v2 18/23] counter: ftm-quaddec: Convert to new counter registration
Date
This fixes device lifetime issues where it was possible to free a live
struct device.

Fixes: a3b9a99980d9 ("counter: add FlexTimer Module Quadrature decoder counter driver")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
drivers/counter/104-quad-8.c | 7 ++++---
drivers/counter/ftm-quaddec.c | 27 +++++++++++++--------------
2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
index 4315b14f239e..680c7ba943a4 100644
--- a/drivers/counter/104-quad-8.c
+++ b/drivers/counter/104-quad-8.c
@@ -1084,7 +1084,8 @@ 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;
@@ -1115,7 +1116,7 @@ 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 */
@@ -1192,7 +1193,7 @@ 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,
- counter->name, priv);
+ counter->name, counter);
if (err)
return err;

diff --git a/drivers/counter/ftm-quaddec.c b/drivers/counter/ftm-quaddec.c
index f5d92df6a611..c636183b1337 100644
--- a/drivers/counter/ftm-quaddec.c
+++ b/drivers/counter/ftm-quaddec.c
@@ -26,7 +26,6 @@
})

struct ftm_quaddec {
- struct counter_device counter;
struct platform_device *pdev;
void __iomem *ftm_base;
bool big_endian;
@@ -259,15 +258,16 @@ static struct counter_count ftm_quaddec_counts = {

static int ftm_quaddec_probe(struct platform_device *pdev)
{
+ struct counter_device *counter;
struct ftm_quaddec *ftm;
-
struct device_node *node = pdev->dev.of_node;
struct resource *io;
int ret;

- ftm = devm_kzalloc(&pdev->dev, sizeof(*ftm), GFP_KERNEL);
- if (!ftm)
+ counter = devm_counter_alloc(&pdev->dev, sizeof(*ftm));
+ if (!counter)
return -ENOMEM;
+ ftm = counter_priv(counter);

io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io) {
@@ -283,14 +283,13 @@ static int ftm_quaddec_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "Failed to map memory region\n");
return -EINVAL;
}
- ftm->counter.name = dev_name(&pdev->dev);
- ftm->counter.parent = &pdev->dev;
- ftm->counter.ops = &ftm_quaddec_cnt_ops;
- ftm->counter.counts = &ftm_quaddec_counts;
- ftm->counter.num_counts = 1;
- ftm->counter.signals = ftm_quaddec_signals;
- ftm->counter.num_signals = ARRAY_SIZE(ftm_quaddec_signals);
- ftm->counter.priv = ftm;
+ counter->name = dev_name(&pdev->dev);
+ counter->parent = &pdev->dev;
+ counter->ops = &ftm_quaddec_cnt_ops;
+ counter->counts = &ftm_quaddec_counts;
+ counter->num_counts = 1;
+ counter->signals = ftm_quaddec_signals;
+ counter->num_signals = ARRAY_SIZE(ftm_quaddec_signals);

mutex_init(&ftm->ftm_quaddec_mutex);

@@ -300,9 +299,9 @@ static int ftm_quaddec_probe(struct platform_device *pdev)
if (ret)
return ret;

- ret = devm_counter_register(&pdev->dev, &ftm->counter);
+ ret = devm_counter_add(&pdev->dev, counter);
if (ret)
- return ret;
+ return dev_err_probe(&pdev->dev, ret, "Failed to add counter\n");

return 0;
}
--
2.33.0
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