Hi Neil, > This helps in reducing code in .remove callbacks and sometimes > dropping .remove callbacks entirely. > > Changes since v1 at http://lkml.kernel.org/r/1464251510-15554-1-git-send-email-narmstrong@xxxxxxxxxxxx : > - Fix brackets in devm_watchdog_register_device() > > Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx> > --- > Documentation/driver-model/devres.txt | 3 +++ > drivers/watchdog/watchdog_core.c | 37 +++++++++++++++++++++++++++++++++++ > include/linux/watchdog.h | 3 +++ > 3 files changed, 43 insertions(+) > > diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt > index c63eea0..589296b 100644 > --- a/Documentation/driver-model/devres.txt > +++ b/Documentation/driver-model/devres.txt > @@ -357,3 +357,6 @@ SLAVE DMA ENGINE > > SPI > devm_spi_register_master() > + > +WATCHDOG > + devm_watchdog_register_device() > diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c > index 981a668..7c5e3dc 100644 > --- a/drivers/watchdog/watchdog_core.c > +++ b/drivers/watchdog/watchdog_core.c > @@ -329,6 +329,43 @@ void watchdog_unregister_device(struct watchdog_device *wdd) > > EXPORT_SYMBOL_GPL(watchdog_unregister_device); > > +static void devm_watchdog_unregister_device(struct device *dev, void *res) > +{ > + watchdog_unregister_device(*(struct watchdog_device **)res); > +} > + > +/** > + * devm_watchdog_register_device() - resource managed watchdog_register_device() > + * @dev: device that is registering this watchdog device > + * @wdd: watchdog device > + * > + * Managed watchdog_register_device(). For watchdog device registered by this > + * function, watchdog_unregister_device() is automatically called on driver > + * detach. See watchdog_register_device() for more information. > + */ > +int devm_watchdog_register_device(struct device *dev, > + struct watchdog_device *wdd) > +{ > + struct watchdog_device **rcwdd; > + int ret; > + > + rcwdd = devres_alloc(devm_watchdog_unregister_device, sizeof(*wdd), > + GFP_KERNEL); > + if (!rcwdd) > + return -ENOMEM; > + > + ret = watchdog_register_device(wdd); > + if (!ret) { > + *rcwdd = wdd; > + devres_add(dev, rcwdd); > + } else { > + devres_free(rcwdd); > + } > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(devm_watchdog_register_device); > + > static int __init watchdog_deferred_registration(void) > { > mutex_lock(&wtd_deferred_reg_mutex); > diff --git a/include/linux/watchdog.h b/include/linux/watchdog.h > index 51732d6c..6b75e38 100644 > --- a/include/linux/watchdog.h > +++ b/include/linux/watchdog.h > @@ -180,4 +180,7 @@ extern int watchdog_init_timeout(struct watchdog_device *wdd, > extern int watchdog_register_device(struct watchdog_device *); > extern void watchdog_unregister_device(struct watchdog_device *); > > +/* devres register variant */ > +int devm_watchdog_register_device(struct device *dev, struct watchdog_device *); > + > #endif /* ifndef _LINUX_WATCHDOG_H */ > -- > 2.7.0 > This patch has been added to linux-watchdog-next. Kind regards, Wim. -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
