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 <[email protected]> Change-Id: I8a2e0616746afe2a6bbd9c24bc3a0eaa84725a75 --- v2: fix forward declaration and genpd_debugfs_dir being NULL - Ulf v3: remove extra trailing char added by mistake in v2 - kernel test robot v4: cleanup includes and regroup CONFIG_DEBUG_FS CPP blocks - Greg drivers/base/power/domain.c | 73 +++++++++++++++++++++++-------------- 1 file changed, 45 insertions(+), 28 deletions(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 2cb5e04cf86c..49c87607cba7 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -21,6 +21,7 @@ #include <linux/suspend.h> #include <linux/export.h> #include <linux/cpu.h> +#include <linux/debugfs.h> #include "power.h" @@ -210,6 +211,18 @@ static void genpd_sd_counter_inc(struct generic_pm_domain *genpd) } #ifdef CONFIG_DEBUG_FS +static struct dentry *genpd_debugfs_dir; + +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); +} + static void genpd_update_accounting(struct generic_pm_domain *genpd) { ktime_t delta, now; @@ -234,6 +247,8 @@ static void genpd_update_accounting(struct generic_pm_domain *genpd) genpd->accounting_time = now; } #else +static inline void genpd_debug_add(struct generic_pm_domain *genpd) {} +static inline void genpd_debug_remove(struct generic_pm_domain *genpd) {} static inline void genpd_update_accounting(struct generic_pm_domain *genpd) {} #endif @@ -1827,6 +1842,7 @@ 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; @@ -1860,6 +1876,7 @@ 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); @@ -2764,14 +2781,6 @@ 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. @@ -3047,9 +3056,34 @@ 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); @@ -3057,25 +3091,8 @@ 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
