From 5998ea6214249e2fe4d23ad43319f0bf4c7d5903 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Thu, 30 Dec 2021 16:02:56 +0100 Subject: [PATCH] counter: microchip-tcb-capture: Convert to new counter registration MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Acked-by: William Breathitt Gray Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20211230150300.72196-20-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/counter/microchip-tcb-capture.c | 28 ++++++++++++++----------- 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c index 1b56b7444668..00844445143b 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; + 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; - 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; } static const struct of_device_id mchp_tc_dt_ids[] = {