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authorTejun Heo <tj@kernel.org>2012-08-03 17:30:47 (GMT)
committerTejun Heo <tj@kernel.org>2012-08-13 23:27:37 (GMT)
commit41f63c5359d14ca995172b8f6eaffd93f60fec54 (patch)
treed3d93dfd25d2e29e8abeae934835f2266b018cb7 /drivers/power/ds2760_battery.c
parent8376fe22c7e79c7e90857d39f82aeae6cad6c4b8 (diff)
downloadlinux-41f63c5359d14ca995172b8f6eaffd93f60fec54.tar.xz
workqueue: use mod_delayed_work() instead of cancel + queue
Convert delayed_work users doing cancel_delayed_work() followed by queue_delayed_work() to mod_delayed_work(). Most conversions are straight-forward. Ones worth mentioning are, * drivers/edac/edac_mc.c: edac_mc_workq_setup() converted to always use mod_delayed_work() and cancel loop in edac_mc_reset_delay_period() is dropped. * drivers/platform/x86/thinkpad_acpi.c: No need to remember whether watchdog is active or not. @fan_watchdog_active and related code dropped. * drivers/power/charger-manager.c: Seemingly a lot of delayed_work_pending() abuse going on here. [delayed_]work_pending() are unsynchronized and racy when used like this. I converted one instance in fullbatt_handler(). Please conver the rest so that it invokes workqueue APIs for the intended target state rather than trying to game work item pending state transitions. e.g. if timer should be modified - call mod_delayed_work(), canceled - call cancel_delayed_work[_sync](). * drivers/thermal/thermal_sys.c: thermal_zone_device_set_polling() simplified. Note that round_jiffies() calls in this function are meaningless. round_jiffies() work on absolute jiffies not delta delay used by delayed_work. v2: Tomi pointed out that __cancel_delayed_work() users can't be safely converted to mod_delayed_work(). They could be calling it from irq context and if that happens while delayed_work_timer_fn() is running, it could deadlock. __cancel_delayed_work() users are dropped. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Anton Vorontsov <cbouatmailru@gmail.com> Acked-by: David Howells <dhowells@redhat.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Doug Thompson <dougthompson@xmission.com> Cc: David Airlie <airlied@linux.ie> Cc: Roland Dreier <roland@kernel.org> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: Zhang Rui <rui.zhang@intel.com> Cc: Len Brown <len.brown@intel.com> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Johannes Berg <johannes@sipsolutions.net>
Diffstat (limited to 'drivers/power/ds2760_battery.c')
-rw-r--r--drivers/power/ds2760_battery.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c
index 076e211..704e652 100644
--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -355,8 +355,7 @@ static void ds2760_battery_external_power_changed(struct power_supply *psy)
dev_dbg(di->dev, "%s\n", __func__);
- cancel_delayed_work(&di->monitor_work);
- queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
+ mod_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
}
@@ -401,8 +400,7 @@ static void ds2760_battery_set_charged(struct power_supply *psy)
/* postpone the actual work by 20 secs. This is for debouncing GPIO
* signals and to let the current value settle. See AN4188. */
- cancel_delayed_work(&di->set_charged_work);
- queue_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20);
+ mod_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20);
}
static int ds2760_battery_get_property(struct power_supply *psy,
@@ -616,8 +614,7 @@ static int ds2760_battery_resume(struct platform_device *pdev)
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
power_supply_changed(&di->bat);
- cancel_delayed_work(&di->monitor_work);
- queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ);
+ mod_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ);
return 0;
}