[PATCH v3 19/23] counter: microchip-tcb-capture: Convert to new counter registration

Uwe Kleine-König
2021-12-29T15:46:10Z

This fixes device lifetime issues where it was possible to free a live
struct device.

Fixes: 106b104137fd ("counter: Add microchip TCB capture 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>
---
drivers/counter/microchip-tcb-capture.c | 30 ++++++++++++++-----------
1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c
index 1b56b7444668..70c1d28546be 100644
--- a/drivers/counter/microchip-tcb-capture.c
+++ b/drivers/counter/microchip-tcb-capture.c
@@ -24,7 +24,6 @@

struct mchp_tc_data {
const struct atmel_tcb_config *tc_cfg;
- struct counter_device counter;
struct regmap *regmap;
int qdec_mode;
int num_channels;
@@ -296,6 +295,7 @@ static int mchp_tc_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
const struct atmel_tcb_config *tcb_config;
const struct of_device_id *match;
+ struct counter_device *counter;
struct mchp_tc_data *priv;
char clk_name[7];
struct regmap *regmap;
@@ -303,9 +303,10 @@ static int mchp_tc_probe(struct platform_device *pdev)
int channel;
int ret, i;

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

match = of_match_node(atmel_tc_of_match, np->parent);
tcb_config = match->data;
@@ -360,16 +361,19 @@ static int mchp_tc_probe(struct platform_device *pdev)

priv->tc_cfg = tcb_config;
priv->regmap = regmap;
- priv->counter.name = dev_name(&pdev->dev);
- priv->counter.parent = &pdev->dev;
- priv->counter.ops = &mchp_tc_ops;
- priv->counter.num_counts = ARRAY_SIZE(mchp_tc_counts);
- priv->counter.counts = mchp_tc_counts;
- priv->counter.num_signals = ARRAY_SIZE(mchp_tc_count_signals);
- priv->counter.signals = mchp_tc_count_signals;
- priv->counter.priv = priv;
-
- return devm_counter_register(&pdev->dev, &priv->counter);
+ counter->name = dev_name(&pdev->dev);
+ counter->parent = &pdev->dev;
+ counter->ops = &mchp_tc_ops;
+ counter->num_counts = ARRAY_SIZE(mchp_tc_counts);
+ counter->counts = mchp_tc_counts;
+ counter->num_signals = ARRAY_SIZE(mchp_tc_count_signals);
+ counter->signals = mchp_tc_count_signals;
+
+ ret = devm_counter_add(&pdev->dev, counter);
+ if (ret < 0)
+ return dev_err_probe(&pdev->dev, ret, "Failed to add counter\n");
+
+ return 0;
}

static const struct of_device_id mchp_tc_dt_ids[] = {
--
2.34.1