From 7e4d68443a80574392d1027ff34992ab945934a6 Mon Sep 17 00:00:00 2001 From: Lan Tianyu Date: Thu, 8 Nov 2012 11:14:08 +0800 Subject: [PATCH] PM / QoS: Resume device before exposing/hiding PM QoS flags Since dev_pm_qos_add_request(), dev_pm_qos_update_request() and dev_pm_qos_remove_request() for PM QoS flags should not be invoked when device in RPM_SUSPENDED, add pm_runtime_get_sync() and pm_runtime_put() around these functions in dev_pm_qos_expose_flags() and dev_pm_qos_hide_flags(). [rjw: Modified the subject and changelog to better reflect the code changes made.] Signed-off-by: Lan Tianyu Signed-off-by: Rafael J. Wysocki --- drivers/base/power/qos.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c index 081db2d25daa..fdc3894bc33a 100644 --- a/drivers/base/power/qos.c +++ b/drivers/base/power/qos.c @@ -633,15 +633,18 @@ int dev_pm_qos_expose_flags(struct device *dev, s32 val) if (!req) return -ENOMEM; + pm_runtime_get_sync(dev); ret = dev_pm_qos_add_request(dev, req, DEV_PM_QOS_FLAGS, val); if (ret < 0) - return ret; + goto fail; dev->power.qos->flags_req = req; ret = pm_qos_sysfs_add_flags(dev); if (ret) __dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_FLAGS); +fail: + pm_runtime_put(dev); return ret; } EXPORT_SYMBOL_GPL(dev_pm_qos_expose_flags); @@ -654,7 +657,9 @@ void dev_pm_qos_hide_flags(struct device *dev) { if (dev->power.qos && dev->power.qos->flags_req) { pm_qos_sysfs_remove_flags(dev); + pm_runtime_get_sync(dev); __dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_FLAGS); + pm_runtime_put(dev); } } EXPORT_SYMBOL_GPL(dev_pm_qos_hide_flags); -- GitLab