debugfs nodes were created in genpd_debug_init alled in late_initcall preventing power domains registered though loadable modules to have a debugfs entry.
Create/remove debugfs nodes when the power domain is added/removed to/from the internal gpd_list. Signed-off-by: Thierry Strudel <tstru...@google.com> --- v2: fix forward declaration and genpd_debugfs_dir being NULL - Ulf drivers/base/power/domain.c | 83 ++++++++++++++++++++++++------------- 1 file changed, 55 insertions(+), 28 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 743268996336..3e40ef5cd9ab 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -24,6 +24,16 @@ #include "power.h" +#ifdef CONFIG_DEBUG_FS +#include <linux/pm.h> +#include <linux/device.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h>4 +#include <linux/init.h> +#include <linux/kobject.h> +static struct dentry *genpd_debugfs_dir; +#endif + #define GENPD_RETRY_MAX_MS 250 /* Approximate */ #define GENPD_DEV_CALLBACK(genpd, type, callback, dev) \ @@ -1880,6 +1890,21 @@ static void genpd_lock_init(struct generic_pm_domain *genpd) } } +#ifdef CONFIG_DEBUG_FS +static void genpd_debug_add(struct generic_pm_domain *genpd); + +static void genpd_debug_remove(struct generic_pm_domain *genpd) +{ + struct dentry *d; + + d = debugfs_lookup(genpd->name, genpd_debugfs_dir); + debugfs_remove(d); +} +#else +static void genpd_debug_add(struct generic_pm_domain *genpd) {} +static void genpd_debug_remove(struct generic_pm_domain *genpd) {} +#endif + /** * pm_genpd_init - Initialize a generic I/O PM domain object. * @genpd: PM domain object to initialize. @@ -1954,6 +1979,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd, mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); + genpd_debug_add(genpd); mutex_unlock(&gpd_list_lock); return 0; @@ -1987,6 +2013,7 @@ static int genpd_remove(struct generic_pm_domain *genpd) kfree(link); } + genpd_debug_remove(genpd); list_del(&genpd->gpd_list_node); genpd_unlock(genpd); cancel_work_sync(&genpd->power_off_work); @@ -2893,14 +2920,6 @@ core_initcall(genpd_bus_init); /*** debugfs support ***/ #ifdef CONFIG_DEBUG_FS -#include <linux/pm.h> -#include <linux/device.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> -#include <linux/init.h> -#include <linux/kobject.h> -static struct dentry *genpd_debugfs_dir; - /* * TODO: This function is a slightly modified version of rtpm_status_show * from sysfs.c, so generalize it. @@ -3177,9 +3196,34 @@ DEFINE_SHOW_ATTRIBUTE(total_idle_time); DEFINE_SHOW_ATTRIBUTE(devices); DEFINE_SHOW_ATTRIBUTE(perf_state); -static int __init genpd_debug_init(void) +static void genpd_debug_add(struct generic_pm_domain *genpd) { struct dentry *d; + + if (!genpd_debugfs_dir) + return; + + d = debugfs_create_dir(genpd->name, genpd_debugfs_dir); + + debugfs_create_file("current_state", 0444, + d, genpd, &status_fops); + debugfs_create_file("sub_domains", 0444, + d, genpd, &sub_domains_fops); + debugfs_create_file("idle_states", 0444, + d, genpd, &idle_states_fops); + debugfs_create_file("active_time", 0444, + d, genpd, &active_time_fops); + debugfs_create_file("total_idle_time", 0444, + d, genpd, &total_idle_time_fops); + debugfs_create_file("devices", 0444, + d, genpd, &devices_fops); + if (genpd->set_performance_state) + debugfs_create_file("perf_state", 0444, + d, genpd, &perf_state_fops); +} + +static int __init genpd_debug_init(void) +{ struct generic_pm_domain *genpd; genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL); @@ -3187,25 +3231,8 @@ static int __init genpd_debug_init(void) debugfs_create_file("pm_genpd_summary", S_IRUGO, genpd_debugfs_dir, NULL, &summary_fops); - list_for_each_entry(genpd, &gpd_list, gpd_list_node) { - d = debugfs_create_dir(genpd->name, genpd_debugfs_dir); - - debugfs_create_file("current_state", 0444, - d, genpd, &status_fops); - debugfs_create_file("sub_domains", 0444, - d, genpd, &sub_domains_fops); - debugfs_create_file("idle_states", 0444, - d, genpd, &idle_states_fops); - debugfs_create_file("active_time", 0444, - d, genpd, &active_time_fops); - debugfs_create_file("total_idle_time", 0444, - d, genpd, &total_idle_time_fops); - debugfs_create_file("devices", 0444, - d, genpd, &devices_fops); - if (genpd->set_performance_state) - debugfs_create_file("perf_state", 0444, - d, genpd, &perf_state_fops); - } + list_for_each_entry(genpd, &gpd_list, gpd_list_node) + genpd_debug_add(genpd); return 0; } -- 2.29.2.576.ga3fc446d84-goog