From e99dec87a9d6890e9cfb806be07e692a6decb92f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Thu, 30 Dec 2021 16:02:54 +0100 Subject: [PATCH] counter: intel-qep: 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: b711f687a1c1 ("counter: Add support for Intel Quadrature Encoder Peripheral") Tested-by: Jarkko Nikula Reviewed-by: Jonathan Cameron Acked-by: William Breathitt Gray Acked-by: Jarkko Nikula Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20211230150300.72196-18-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/counter/intel-qep.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/counter/intel-qep.c b/drivers/counter/intel-qep.c index 8f84a48508ac..47a6a9dfc9e8 100644 --- a/drivers/counter/intel-qep.c +++ b/drivers/counter/intel-qep.c @@ -63,7 +63,6 @@ #define INTEL_QEP_CLK_PERIOD_NS 10 struct intel_qep { - struct counter_device counter; struct mutex lock; struct device *dev; void __iomem *regs; @@ -392,14 +391,16 @@ static struct counter_count intel_qep_counter_count[] = { static int intel_qep_probe(struct pci_dev *pci, const struct pci_device_id *id) { + struct counter_device *counter; struct intel_qep *qep; struct device *dev = &pci->dev; void __iomem *regs; int ret; - qep = devm_kzalloc(dev, sizeof(*qep), GFP_KERNEL); - if (!qep) + counter = devm_counter_alloc(dev, sizeof(*qep)); + if (!counter) return -ENOMEM; + qep = counter_priv(counter); ret = pcim_enable_device(pci); if (ret) @@ -422,20 +423,23 @@ static int intel_qep_probe(struct pci_dev *pci, const struct pci_device_id *id) intel_qep_init(qep); pci_set_drvdata(pci, qep); - qep->counter.name = pci_name(pci); - qep->counter.parent = dev; - qep->counter.ops = &intel_qep_counter_ops; - qep->counter.counts = intel_qep_counter_count; - qep->counter.num_counts = ARRAY_SIZE(intel_qep_counter_count); - qep->counter.signals = intel_qep_signals; - qep->counter.num_signals = ARRAY_SIZE(intel_qep_signals); - qep->counter.priv = qep; + counter->name = pci_name(pci); + counter->parent = dev; + counter->ops = &intel_qep_counter_ops; + counter->counts = intel_qep_counter_count; + counter->num_counts = ARRAY_SIZE(intel_qep_counter_count); + counter->signals = intel_qep_signals; + counter->num_signals = ARRAY_SIZE(intel_qep_signals); qep->enabled = false; pm_runtime_put(dev); pm_runtime_allow(dev); - return devm_counter_register(&pci->dev, &qep->counter); + ret = devm_counter_add(&pci->dev, counter); + if (ret < 0) + return dev_err_probe(&pci->dev, ret, "Failed to add counter\n"); + + return 0; } static void intel_qep_remove(struct pci_dev *pci)