diff options
author | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2020-11-09 17:34:08 +0100 |
---|---|---|
committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2020-11-19 12:50:12 +0100 |
commit | fdcfd854333be5b30377dc5daa9cd0fa1643a979 (patch) | |
tree | 89b755560a425f0eb332a86037e2b6d429b7fb5a /drivers | |
parent | 6746bc095bbd1da719aadd9a11fe2c75a12f22e0 (diff) |
rtc: rework rtc_register_device() resource management
rtc_register_device() is a managed interface but it doesn't use devres
by itself - instead it marks an rtc_device as "registered" and the devres
callback for devm_rtc_allocate_device() takes care of resource release.
This doesn't correspond with the design behind devres where managed
structures should not be aware of being managed. The correct solution
here is to register a separate devres callback for unregistering the
device.
While at it: rename rtc_register_device() to devm_rtc_register_device()
and add it to the list of managed interfaces in devres.rst. This way we
can avoid any potential confusion of driver developers who may expect
there to exist a corresponding unregister function.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201109163409.24301-8-brgl@bgdev.pl
Diffstat (limited to 'drivers')
111 files changed, 118 insertions, 121 deletions
diff --git a/drivers/mfd/menelaus.c b/drivers/mfd/menelaus.c index b64d3315a5e1..07e0ca2e467c 100644 --- a/drivers/mfd/menelaus.c +++ b/drivers/mfd/menelaus.c @@ -1119,7 +1119,7 @@ static inline void menelaus_rtc_init(struct menelaus_chip *m) menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control); } - err = rtc_register_device(m->rtc); + err = devm_rtc_register_device(m->rtc); if (err) { if (alarm) { menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ); diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index a99b7d24b77c..b8a34ee039ad 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -321,8 +321,10 @@ static void rtc_device_get_offset(struct rtc_device *rtc) * * @rtc: the RTC class device to destroy */ -static void rtc_device_unregister(struct rtc_device *rtc) +static void devm_rtc_unregister_device(void *data) { + struct rtc_device *rtc = data; + mutex_lock(&rtc->ops_lock); /* * Remove innards of this RTC, then disable it, before @@ -339,10 +341,7 @@ static void devm_rtc_release_device(struct device *dev, void *res) { struct rtc_device *rtc = *(struct rtc_device **)res; - if (rtc->registered) - rtc_device_unregister(rtc); - else - put_device(&rtc->dev); + put_device(&rtc->dev); } struct rtc_device *devm_rtc_allocate_device(struct device *dev) @@ -383,7 +382,7 @@ exit_ida: } EXPORT_SYMBOL_GPL(devm_rtc_allocate_device); -int __rtc_register_device(struct module *owner, struct rtc_device *rtc) +int __devm_rtc_register_device(struct module *owner, struct rtc_device *rtc) { struct rtc_wkalrm alrm; int err; @@ -413,7 +412,6 @@ int __rtc_register_device(struct module *owner, struct rtc_device *rtc) rtc_proc_add_device(rtc); - rtc->registered = true; dev_info(rtc->dev.parent, "registered as %s\n", dev_name(&rtc->dev)); @@ -422,9 +420,10 @@ int __rtc_register_device(struct module *owner, struct rtc_device *rtc) rtc_hctosys(rtc); #endif - return 0; + return devm_add_action_or_reset(rtc->dev.parent, + devm_rtc_unregister_device, rtc); } -EXPORT_SYMBOL_GPL(__rtc_register_device); +EXPORT_SYMBOL_GPL(__devm_rtc_register_device); /** * devm_rtc_device_register - resource managed rtc_device_register() @@ -454,7 +453,7 @@ struct rtc_device *devm_rtc_device_register(struct device *dev, rtc->ops = ops; - err = __rtc_register_device(owner, rtc); + err = __devm_rtc_register_device(owner, rtc); if (err) return ERR_PTR(err); diff --git a/drivers/rtc/rtc-88pm80x.c b/drivers/rtc/rtc-88pm80x.c index 75779e8501a3..6a3f44cf6ebe 100644 --- a/drivers/rtc/rtc-88pm80x.c +++ b/drivers/rtc/rtc-88pm80x.c @@ -294,7 +294,7 @@ static int pm80x_rtc_probe(struct platform_device *pdev) info->rtc_dev->ops = &pm80x_rtc_ops; info->rtc_dev->range_max = U32_MAX; - ret = rtc_register_device(info->rtc_dev); + ret = devm_rtc_register_device(info->rtc_dev); if (ret) goto out_rtc; diff --git a/drivers/rtc/rtc-88pm860x.c b/drivers/rtc/rtc-88pm860x.c index c90457d001e9..2c809a1a445e 100644 --- a/drivers/rtc/rtc-88pm860x.c +++ b/drivers/rtc/rtc-88pm860x.c @@ -307,7 +307,7 @@ static int pm860x_rtc_probe(struct platform_device *pdev) info->rtc_dev->ops = &pm860x_rtc_ops; info->rtc_dev->range_max = U32_MAX; - ret = rtc_register_device(info->rtc_dev); + ret = devm_rtc_register_device(info->rtc_dev); if (ret) return ret; diff --git a/drivers/rtc/rtc-ab-b5ze-s3.c b/drivers/rtc/rtc-ab-b5ze-s3.c index 2370ac0cdb5f..6e3e320dc727 100644 --- a/drivers/rtc/rtc-ab-b5ze-s3.c +++ b/drivers/rtc/rtc-ab-b5ze-s3.c @@ -892,7 +892,7 @@ static int abb5zes3_probe(struct i2c_client *client, } } - ret = rtc_register_device(data->rtc); + ret = devm_rtc_register_device(data->rtc); err: if (ret && data->irq) diff --git a/drivers/rtc/rtc-ab-eoz9.c b/drivers/rtc/rtc-ab-eoz9.c index d690985caa4c..b20d8f26dcdb 100644 --- a/drivers/rtc/rtc-ab-eoz9.c +++ b/drivers/rtc/rtc-ab-eoz9.c @@ -420,7 +420,7 @@ static int abeoz9_probe(struct i2c_client *client, data->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000; data->rtc->range_max = RTC_TIMESTAMP_END_2099; - ret = rtc_register_device(data->rtc); + ret = devm_rtc_register_device(data->rtc); if (ret) return ret; diff --git a/drivers/rtc/rtc-ab3100.c b/drivers/rtc/rtc-ab3100.c index 2ed6def90975..e4fd961e8bf6 100644 --- a/drivers/rtc/rtc-ab3100.c +++ b/drivers/rtc/rtc-ab3100.c @@ -238,7 +238,7 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, rtc); - return rtc_register_device(rtc); + return devm_rtc_register_device(rtc); } static struct platform_driver ab3100_rtc_driver = { diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c index 3d60f3283f11..b40048871295 100644 --- a/drivers/rtc/rtc-ab8500.c +++ b/drivers/rtc/rtc-ab8500.c @@ -404,7 +404,7 @@ static int ab8500_rtc_probe(struct platform_device *pdev) if (err) return err; - return rtc_register_device(rtc); + return devm_rtc_register_device(rtc); } static int ab8500_rtc_remove(struct platform_device *pdev) diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c index 803725b3a02c..6733bb0df674 100644 --- a/drivers/rtc/rtc-abx80x.c +++ b/drivers/rtc/rtc-abx80x.c @@ -851,7 +851,7 @@ static int abx80x_probe(struct i2c_client *client, return err; } - return rtc_register_device(priv->rtc); + return devm_rtc_register_device(priv->rtc); } static const struct i2c_device_id abx80x_id[] = { diff --git a/drivers/rtc/rtc-ac100.c b/drivers/rtc/rtc-ac100.c index 29223931aba7..1ddbef99e38f 100644 --- a/drivers/rtc/rtc-ac100.c +++ b/drivers/rtc/rtc-ac100.c @@ -610,7 +610,7 @@ static int ac100_rtc_probe(struct platform_device *pdev) if (ret) return ret; - return rtc_register_device(chip->rtc); + return devm_rtc_register_device(chip->rtc); } static int ac100_rtc_remove(struct platform_device *pdev) diff --git a/drivers/rtc/rtc-armada38x.c b/drivers/rtc/rtc-armada38x.c index 94d7c22fc4f3..807a79c07f08 100644 --- a/drivers/rtc/rtc-armada38x.c +++ b/drivers/rtc/rtc-armada38x.c @@ -556,7 +556,7 @@ static __init int armada38x_rtc_probe(struct platform_device *pdev) rtc->rtc_dev->range_max = U32_MAX; - return rtc_register_device(rtc->rtc_dev); + return devm_rtc_register_device(rtc->rtc_dev); } #ifdef CONFIG_PM_SLEEP diff --git a/drivers/rtc/rtc-aspeed.c b/drivers/rtc/rtc-aspeed.c index eacdd0637cce..a93352ed3aec 100644 --- a/drivers/rtc/rtc-aspeed.c +++ b/drivers/rtc/rtc-aspeed.c @@ -104,7 +104,7 @@ static int aspeed_rtc_probe(struct platform_device *pdev) rtc->rtc_dev->range_min = RTC_TIMESTAMP_BEGIN_1900; rtc->rtc_dev->range_max = 38814989399LL; /* 3199-12-31 23:59:59 */ - return rtc_register_device(rtc->rtc_dev); + return devm_rtc_register_device(rtc->rtc_dev); } static const struct of_device_id aspeed_rtc_match[] = { diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c index da24e68adcca..fe396d27ebb7 100644 --- a/drivers/rtc/rtc-at91rm9200.c +++ b/drivers/rtc/rtc-at91rm9200.c @@ -538,7 +538,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev) rtc->range_min = RTC_TIMESTAMP_BEGIN_1900; rtc->range_max = RTC_TIMESTAMP_END_2099; - ret = rtc_register_device(rtc); + ret = devm_rtc_register_device(rtc); if (ret) goto err_clk; diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c index e39e89867d29..2216be429ab7 100644 --- a/drivers/rtc/rtc-at91sam9.c +++ b/drivers/rtc/rtc-at91sam9.c @@ -431,7 +431,7 @@ static int at91_rtc_probe(struct platform_device *pdev) dev_warn(&pdev->dev, "%s: SET TIME!\n", dev_name(&rtc->rtcdev->dev)); - return rtc_register_device(rtc->rtcdev); + return devm_rtc_register_device(rtc->rtcdev); err_clk: clk_disable_unprepare(rtc->sclk); diff --git a/drivers/rtc/rtc-au1xxx.c b/drivers/rtc/rtc-au1xxx.c index 791bebcb6f47..e6428b27b5d4 100644 --- a/drivers/rtc/rtc-au1xxx.c +++ b/drivers/rtc/rtc-au1xxx.c @@ -104,7 +104,7 @@ static int au1xtoy_rtc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, rtcdev); - return rtc_register_device(rtcdev); + return devm_rtc_register_device(rtcdev); } static struct platform_driver au1xrtc_driver = { diff --git a/drivers/rtc/rtc-bd70528.c b/drivers/rtc/rtc-bd70528.c index 4492b770422c..17cb67f5bf6e 100644 --- a/drivers/rtc/rtc-bd70528.c +++ b/drivers/rtc/rtc-bd70528.c @@ -604,7 +604,7 @@ static int bd70528_probe(struct platform_device *pdev) } } - return rtc_register_device(rtc); + return devm_rtc_register_device(rtc); } static const struct platform_device_id bd718x7_rtc_id[] = { diff --git a/drivers/rtc/rtc-brcmstb-waketimer.c b/drivers/rtc/rtc-brcmstb-waketimer.c index 375a9987a1d6..0366e2ff04ae 100644 --- a/drivers/rtc/rtc-brcmstb-waketimer.c +++ b/drivers/rtc/rtc-brcmstb-waketimer.c @@ -252,7 +252,7 @@ static int brcmstb_waketmr_probe(struct platform_device *pd |