diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-12-30 16:02:57 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-30 17:44:07 +0100 |
| commit | e1717d2ea09fb83f3211bcc9ceeaf42fce58fae5 (patch) | |
| tree | ef89896d836591e3e5d774c93902b52d33241aea /drivers/counter | |
| parent | 5998ea6214249e2fe4d23ad43319f0bf4c7d5903 (diff) | |
| download | lwn-e1717d2ea09fb83f3211bcc9ceeaf42fce58fae5.tar.gz lwn-e1717d2ea09fb83f3211bcc9ceeaf42fce58fae5.zip | |
counter: stm32-timer-cnt: Convert to new counter registration
This fixes device lifetime issues where it was possible to free a live
struct device.
Fixes: ad29937e206f ("counter: Add STM32 Timer quadrature encoder")
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/20211230150300.72196-21-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/counter')
| -rw-r--r-- | drivers/counter/stm32-timer-cnt.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c index 4b05b198a8d8..5779ae7c73cf 100644 --- a/drivers/counter/stm32-timer-cnt.c +++ b/drivers/counter/stm32-timer-cnt.c @@ -29,7 +29,6 @@ struct stm32_timer_regs { }; struct stm32_timer_cnt { - struct counter_device counter; struct regmap *regmap; struct clk *clk; u32 max_arr; @@ -317,31 +316,38 @@ static int stm32_timer_cnt_probe(struct platform_device *pdev) struct stm32_timers *ddata = dev_get_drvdata(pdev->dev.parent); struct device *dev = &pdev->dev; struct stm32_timer_cnt *priv; + struct counter_device *counter; + int ret; if (IS_ERR_OR_NULL(ddata)) return -EINVAL; - 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->regmap = ddata->regmap; priv->clk = ddata->clk; priv->max_arr = ddata->max_arr; - priv->counter.name = dev_name(dev); - priv->counter.parent = dev; - priv->counter.ops = &stm32_timer_cnt_ops; - priv->counter.counts = &stm32_counts; - priv->counter.num_counts = 1; - priv->counter.signals = stm32_signals; - priv->counter.num_signals = ARRAY_SIZE(stm32_signals); - priv->counter.priv = priv; + counter->name = dev_name(dev); + counter->parent = dev; + counter->ops = &stm32_timer_cnt_ops; + counter->counts = &stm32_counts; + counter->num_counts = 1; + counter->signals = stm32_signals; + counter->num_signals = ARRAY_SIZE(stm32_signals); platform_set_drvdata(pdev, priv); /* Register Counter device */ - return devm_counter_register(dev, &priv->counter); + ret = devm_counter_add(dev, counter); + if (ret < 0) + dev_err_probe(dev, ret, "Failed to add counter\n"); + + return ret; } static int __maybe_unused stm32_timer_cnt_suspend(struct device *dev) |