diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-12-30 16:02:58 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-30 17:44:07 +0100 |
| commit | e75d678d041fe55c7289e2a3d36de9c4f0abbf97 (patch) | |
| tree | 17225827c0926d4b64255c695e00658b4bf3f22d /drivers | |
| parent | e1717d2ea09fb83f3211bcc9ceeaf42fce58fae5 (diff) | |
| download | lwn-e75d678d041fe55c7289e2a3d36de9c4f0abbf97.tar.gz lwn-e75d678d041fe55c7289e2a3d36de9c4f0abbf97.zip | |
counter: stm32-lptimer-cnt: Convert to new counter registration
This fixes device lifetime issues where it was possible to free a live
struct device.
Fixes: 597f55e3f36c ("counter: stm32-lptimer: add counter device")
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/20211230150300.72196-22-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/counter/stm32-lptimer-cnt.c | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c index 9cf00e929cc0..68031d93ce89 100644 --- a/drivers/counter/stm32-lptimer-cnt.c +++ b/drivers/counter/stm32-lptimer-cnt.c @@ -20,7 +20,6 @@ #include <linux/types.h> struct stm32_lptim_cnt { - struct counter_device counter; struct device *dev; struct regmap *regmap; struct clk *clk; @@ -411,14 +410,17 @@ static struct counter_count stm32_lptim_in1_counts = { static int stm32_lptim_cnt_probe(struct platform_device *pdev) { struct stm32_lptimer *ddata = dev_get_drvdata(pdev->dev.parent); + struct counter_device *counter; struct stm32_lptim_cnt *priv; + int ret; if (IS_ERR_OR_NULL(ddata)) return -EINVAL; - 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); priv->dev = &pdev->dev; priv->regmap = ddata->regmap; @@ -426,23 +428,26 @@ static int stm32_lptim_cnt_probe(struct platform_device *pdev) priv->ceiling = STM32_LPTIM_MAX_ARR; /* Initialize Counter device */ - priv->counter.name = dev_name(&pdev->dev); - priv->counter.parent = &pdev->dev; - priv->counter.ops = &stm32_lptim_cnt_ops; + counter->name = dev_name(&pdev->dev); + counter->parent = &pdev->dev; + counter->ops = &stm32_lptim_cnt_ops; if (ddata->has_encoder) { - priv->counter.counts = &stm32_lptim_enc_counts; - priv->counter.num_signals = ARRAY_SIZE(stm32_lptim_cnt_signals); + counter->counts = &stm32_lptim_enc_counts; + counter->num_signals = ARRAY_SIZE(stm32_lptim_cnt_signals); } else { - priv->counter.counts = &stm32_lptim_in1_counts; - priv->counter.num_signals = 1; + counter->counts = &stm32_lptim_in1_counts; + counter->num_signals = 1; } - priv->counter.num_counts = 1; - priv->counter.signals = stm32_lptim_cnt_signals; - priv->counter.priv = priv; + counter->num_counts = 1; + counter->signals = stm32_lptim_cnt_signals; platform_set_drvdata(pdev, priv); - return devm_counter_register(&pdev->dev, &priv->counter); + ret = devm_counter_add(&pdev->dev, counter); + if (ret < 0) + return dev_err_probe(&pdev->dev, ret, "Failed to add counter\n"); + + return 0; } #ifdef CONFIG_PM_SLEEP |