diff options
Diffstat (limited to 'drivers/base/power/runtime.c')
| -rw-r--r-- | drivers/base/power/runtime.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 6bb3aaf..8c78443 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -8,6 +8,7 @@ */ #include <linux/sched.h> +#include <linux/export.h> #include <linux/pm_runtime.h> #include <trace/events/rpm.h> #include "power.h" @@ -29,13 +30,10 @@ static int rpm_suspend(struct device *dev, int rpmflags); void update_pm_runtime_accounting(struct device *dev) { unsigned long now = jiffies; - int delta; + unsigned long delta; delta = now - dev->power.accounting_timestamp; - if (delta < 0) - delta = 0; - dev->power.accounting_timestamp = now; if (dev->power.disable_depth > 0) @@ -296,6 +294,9 @@ static int rpm_callback(int (*cb)(struct device *), struct device *dev) * the callback was running then carry it out, otherwise send an idle * notification for its parent (if the suspend succeeded and both * ignore_children of parent->power and irq_safe of dev->power are not set). + * If ->runtime_suspend failed with -EAGAIN or -EBUSY, and if the RPM_AUTO + * flag is set and the next autosuspend-delay expiration time is in the + * future, schedule another autosuspend attempt. * * This function must be called under dev->power.lock with interrupts disabled. */ @@ -416,10 +417,21 @@ static int rpm_suspend(struct device *dev, int rpmflags) if (retval) { __update_runtime_status(dev, RPM_ACTIVE); dev->power.deferred_resume = false; - if (retval == -EAGAIN || retval == -EBUSY) + if (retval == -EAGAIN || retval == -EBUSY) { dev->power.runtime_error = 0; - else + + /* + * If the callback routine failed an autosuspend, and + * if the last_busy time has been updated so that there + * is a new autosuspend expiration time, automatically + * reschedule another autosuspend. + */ + if ((rpmflags & RPM_AUTO) && + pm_runtime_autosuspend_expiration(dev) != 0) + goto repeat; + } else { pm_runtime_cancel_pending(dev); + } wake_up_all(&dev->power.wait_queue); goto out; } |
