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Code Issues Releases Wiki Activity

counter: ftm-quaddec: Convert to new counter registration 

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

Fixes: a3b9a99980 ("counter: add FlexTimer Module Quadrature decoder counter driver")
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/20211230150300.72196-19-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Uwe Kleine-König 2021-12-30 16:02:55 +01:00 committed by Greg Kroah-Hartman
parent e99dec87a9
commit b5d6547c8e
1 changed files with 13 additions and 13 deletions
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26
drivers/counter/ftm-quaddec.c
View File

@ -26,7 +26,6 @@
})
struct ftm_quaddec {
struct counter_device counter;
struct platform_device *pdev;
void __iomem *ftm_base;
bool big_endian;
@ -259,15 +258,17 @@ 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 +284,13 @@ 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 +300,9 @@ 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;
}