23 files changed, 28 insertions, 92 deletions

diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt
index 6c9f5d9aa115..6c470c71ba27 100644
--- a/Documentation/power/runtime_pm.txt
+++ b/Documentation/power/runtime_pm.txt
@@ -660,11 +660,6 @@ Subsystems may wish to conserve code space by using the set of generic power
 management callbacks provided by the PM core, defined in
 driver/base/power/generic_ops.c:
 
-  int pm_generic_runtime_idle(struct device *dev);
-    - invoke the ->runtime_idle() callback provided by the driver of this
-      device, if defined, and call pm_runtime_suspend() for this device if the
-      return value is 0 or the callback is not defined
-
   int pm_generic_runtime_suspend(struct device *dev);
     - invoke the ->runtime_suspend() callback provided by the driver of this
       device and return its result, or return -EINVAL if not defined
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index e6d230700b2b..e37feb2f05a3 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -591,11 +591,6 @@ static int _od_runtime_suspend(struct device *dev)
         return ret;
 }
 
-static int _od_runtime_idle(struct device *dev)
-{
-        return pm_generic_runtime_idle(dev);
-}
-
 static int _od_runtime_resume(struct device *dev)
 {
         struct platform_device *pdev = to_platform_device(dev);
@@ -653,7 +648,7 @@ static int _od_resume_noirq(struct device *dev)
 struct dev_pm_domain omap_device_pm_domain = {
         .ops = {
                 SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume,
-                                   _od_runtime_idle)
+                                   NULL)
                 USE_PLATFORM_PM_SLEEP_OPS
                 .suspend_noirq = _od_suspend_noirq,
                 .resume_noirq = _od_resume_noirq,
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index bc493aa3af19..1eb8b6258786 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -886,7 +886,6 @@ static struct dev_pm_domain acpi_general_pm_domain = {
 #ifdef CONFIG_PM_RUNTIME
                 .runtime_suspend = acpi_subsys_runtime_suspend,
                 .runtime_resume = acpi_subsys_runtime_resume,
-                .runtime_idle = pm_generic_runtime_idle,
 #endif
 #ifdef CONFIG_PM_SLEEP
                 .prepare = acpi_subsys_prepare,
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index cdbad3a454a0..c6707278a6bb 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -284,7 +284,7 @@ static const struct dev_pm_ops amba_pm = {
         SET_RUNTIME_PM_OPS(
                 amba_pm_runtime_suspend,
                 amba_pm_runtime_resume,
-                pm_generic_runtime_idle
+                NULL
         )
 };
 
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 63c743baf920..84e3b62aa368 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5430,7 +5430,7 @@ static int ata_port_runtime_idle(struct device *dev)
                                 return -EBUSY;
         }
 
-        return pm_runtime_suspend(dev);
+        return 0;
 }
 
 static int ata_port_runtime_suspend(struct device *dev)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 9eda84246ffd..96a930387ebc 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -888,7 +888,6 @@ int platform_pm_restore(struct device *dev)
 static const struct dev_pm_ops platform_dev_pm_ops = {
         .runtime_suspend = pm_generic_runtime_suspend,
         .runtime_resume = pm_generic_runtime_resume,
-        .runtime_idle = pm_generic_runtime_idle,
         USE_PLATFORM_PM_SLEEP_OPS
 };
 
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 7072404c8b6d..bfb8955c406c 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2143,7 +2143,6 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
         genpd->max_off_time_changed = true;
         genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend;
         genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume;
-        genpd->domain.ops.runtime_idle = pm_generic_runtime_idle;
         genpd->domain.ops.prepare = pm_genpd_prepare;
         genpd->domain.ops.suspend = pm_genpd_suspend;
         genpd->domain.ops.suspend_late = pm_genpd_suspend_late;
diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c
index bfd898b8988e..5ee030a864f9 100644
--- a/drivers/base/power/generic_ops.c
+++ b/drivers/base/power/generic_ops.c
@@ -12,29 +12,6 @@
 
 #ifdef CONFIG_PM_RUNTIME
 /**
- * pm_generic_runtime_idle - Generic runtime idle callback for subsystems.
- * @dev: Device to handle.
- *
- * If PM operations are defined for the @dev's driver and they include
- * ->runtime_idle(), execute it and return its error code, if nonzero.
- * Otherwise, execute pm_runtime_suspend() for the device and return 0.
- */
-int pm_generic_runtime_idle(struct device *dev)
-{
-        const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
-
-        if (pm && pm->runtime_idle) {
-                int ret = pm->runtime_idle(dev);
-                if (ret)
-                        return ret;
-        }
-
-        pm_runtime_suspend(dev);
-        return 0;
-}
-EXPORT_SYMBOL_GPL(pm_generic_runtime_idle);
-
-/**
  * pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems.
  * @dev: Device to suspend.
  *
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index ef13ad08afb2..268a35097578 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -293,11 +293,8 @@ static int rpm_idle(struct device *dev, int rpmflags)
         /* Pending requests need to be canceled. */
         dev->power.request = RPM_REQ_NONE;
 
-        if (dev->power.no_callbacks) {
-                /* Assume ->runtime_idle() callback would have suspended. */
-                retval = rpm_suspend(dev, rpmflags);
+        if (dev->power.no_callbacks)
                 goto out;
-        }
 
         /* Carry out an asynchronous or a synchronous idle notification. */
         if (rpmflags & RPM_ASYNC) {
@@ -306,7 +303,8 @@ static int rpm_idle(struct device *dev, int rpmflags)
                         dev->power.request_pending = true;
                         queue_work(pm_wq, &dev->power.work);
                 }
-                goto out;
+                trace_rpm_return_int(dev, _THIS_IP_, 0);
+                return 0;
         }
 
         dev->power.idle_notification = true;
@@ -326,14 +324,14 @@ static int rpm_idle(struct device *dev, int rpmflags)
                 callback = dev->driver->pm->runtime_idle;
 
         if (callback)
-                __rpm_callback(callback, dev);
+                retval = __rpm_callback(callback, dev);
 
         dev->power.idle_notification = false;
         wake_up_all(&dev->power.wait_queue);
 
  out:
         trace_rpm_return_int(dev, _THIS_IP_, retval);
-        return retval;
+        return retval ? retval : rpm_suspend(dev, rpmflags);
 }
 
 /**
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index a0de82e21a7c..a975ebebea8a 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -1405,7 +1405,7 @@ static int dma_runtime_idle(struct device *dev)
                         return -EAGAIN;
         }
 
-        return pm_schedule_suspend(dev, 0);
+        return 0;
 }
 
 /******************************************************************************
diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
index 62ef10a641c4..89d0d2a3b1bb 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -305,11 +305,7 @@ static const struct irq_domain_ops lnw_gpio_irq_ops = {
 
 static int lnw_gpio_runtime_idle(struct device *dev)
 {
-        int err = pm_schedule_suspend(dev, 500);
-
-        if (!err)
-                return 0;
-
+        pm_schedule_suspend(dev, 500);
         return -EBUSY;
 }
 
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 48e31ed69dbf..f32ca293ae0e 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -435,7 +435,7 @@ static const struct dev_pm_ops i2c_device_pm_ops = {
         SET_RUNTIME_PM_OPS(
                 pm_generic_runtime_suspend,
                 pm_generic_runtime_resume,
-                pm_generic_runtime_idle
+                NULL
         )
 };
 
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index 13f7866de46e..3598b0ecf8c7 100644
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -886,12 +886,6 @@ static int ab8500_gpadc_runtime_resume(struct device *dev)
         return ret;
 }
 
-static int ab8500_gpadc_runtime_idle(struct device *dev)
-{
-        pm_runtime_suspend(dev);
-        return 0;
-}
-
 static int ab8500_gpadc_suspend(struct device *dev)
 {
         struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
@@ -1039,7 +1033,7 @@ static int ab8500_gpadc_remove(struct platform_device *pdev)
 static const struct dev_pm_ops ab8500_gpadc_pm_ops = {
         SET_RUNTIME_PM_OPS(ab8500_gpadc_runtime_suspend,
                            ab8500_gpadc_runtime_resume,
-                           ab8500_gpadc_runtime_idle)
+                           NULL)
         SET_SYSTEM_SLEEP_PM_OPS(ab8500_gpadc_suspend,
                                 ab8500_gpadc_resume)
 
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index e219c97a02a4..9d5c71125576 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -164,7 +164,7 @@ static int mmc_runtime_resume(struct device *dev)
 
 static int mmc_runtime_idle(struct device *dev)
 {
-        return pm_runtime_suspend(dev);
+        return 0;
 }
 
 #endif /* !CONFIG_PM_RUNTIME */
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 546c67c2bbbf..6d67492a9247 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -211,7 +211,7 @@ static const struct dev_pm_ops sdio_bus_pm_ops = {
         SET_RUNTIME_PM_OPS(
                 pm_generic_runtime_suspend,
                 pm_generic_runtime_resume,
-                pm_generic_runtime_idle
+                NULL
         )
 };
 
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 79277fb36c6b..e6515e21afa3 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1050,26 +1050,22 @@ static int pci_pm_runtime_idle(struct device *dev)
 {
         struct pci_dev *pci_dev = to_pci_dev(dev);
         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
+        int ret = 0;
 
         /*
          * If pci_dev->driver is not set (unbound), the device should
          * always remain in D0 regardless of the runtime PM status
          */
         if (!pci_dev->driver)
-                goto out;
+                return 0;
 
         if (!pm)
                 return -ENOSYS;
 
-        if (pm->runtime_idle) {
-                int ret = pm->runtime_idle(dev);
-                if (ret)
-                        return ret;
-        }
+        if (pm->runtime_idle)
+                ret = pm->runtime_idle(dev);
 
-out:
-        pm_runtime_suspend(dev);
-        return 0;
+        return ret;
 }
 
 #else /* !CONFIG_PM_RUNTIME */
diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
index 42539ee2cb11..4c5aabe21755 100644
--- a/drivers/scsi/scsi_pm.c
+++ b/drivers/scsi/scsi_pm.c
@@ -229,8 +229,6 @@ static int scsi_runtime_resume(struct device *dev)
 
 static int scsi_runtime_idle(struct device *dev)
 {
-        int err;
-
         dev_dbg(dev, "scsi_runtime_idle\n");
 
         /* Insert hooks here for targets, hosts, and transport classes */
@@ -240,14 +238,11 @@ static int scsi_runtime_idle(struct device *dev)
 
                 if (sdev->request_queue->dev) {
                         pm_runtime_mark_last_busy(dev);
-                        err = pm_runtime_autosuspend(dev);
-                } else {
-                        err = pm_runtime_suspend(dev);
+                        pm_runtime_autosuspend(dev);
+                        return -EBUSY;
                 }
-        } else {
-                err = pm_runtime_suspend(dev);
         }
-        return err;
+        return 0;
 }
 
 int scsi_autopm_get_device(struct scsi_device *sdev)
diff --git a/drivers/sh/pm_runtime.c b/drivers/sh/pm_runtime.c
index afe9282629b9..8afa5a4589f2 100644
--- a/drivers/sh/pm_runtime.c
+++ b/drivers/sh/pm_runtime.c
@@ -25,7 +25,7 @@
 static int default_platform_runtime_idle(struct device *dev)
 {
         /* suspend synchronously to disable clocks immediately */
-        return pm_runtime_suspend(dev);
+        return 0;
 }
 
 static struct dev_pm_domain default_pm_domain = {
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 32b7bb111eb6..095cfaded1c0 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -223,7 +223,7 @@ static const struct dev_pm_ops spi_pm = {
         SET_RUNTIME_PM_OPS(
                 pm_generic_runtime_suspend,
                 pm_generic_runtime_resume,
-                pm_generic_runtime_idle
+                NULL
         )
 };
 
diff --git a/drivers/tty/serial/mfd.c b/drivers/tty/serial/mfd.c
index 5f4765a7a5c5..5dfcf3bae23a 100644
--- a/drivers/tty/serial/mfd.c
+++ b/drivers/tty/serial/mfd.c
@@ -1248,13 +1248,8 @@ static int serial_hsu_resume(struct pci_dev *pdev)
 #ifdef CONFIG_PM_RUNTIME
 static int serial_hsu_runtime_idle(struct device *dev)
 {
-        int err;
-
-        err = pm_schedule_suspend(dev, 500);
-        if (err)
-                return -EBUSY;
-
-        return 0;
+        pm_schedule_suspend(dev, 500);
+        return -EBUSY;
 }
 
 static int serial_hsu_runtime_suspend(struct device *dev)
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 6eab440e1542..7609ac4aed1c 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1765,7 +1765,8 @@ int usb_runtime_idle(struct device *dev)
          */
         if (autosuspend_check(udev) == 0)
                 pm_runtime_autosuspend(dev);
-        return 0;
+        /* Tell the core not to suspend it, though. */
+        return -EBUSY;
 }
 
 int usb_set_usb2_hardware_lpm(struct usb_device *udev, int enable)
diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c
index b8bad294eeb8..8c1b2c509467 100644
--- a/drivers/usb/core/port.c
+++ b/drivers/usb/core/port.c
@@ -141,7 +141,6 @@ static const struct dev_pm_ops usb_port_pm_ops = {
 #ifdef CONFIG_PM_RUNTIME
         .runtime_suspend =      usb_port_runtime_suspend,
         .runtime_resume =       usb_port_runtime_resume,
-        .runtime_idle =         pm_generic_runtime_idle,
 #endif
 };
 
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 7d7e09efff9b..6fa7cea25da9 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -37,7 +37,6 @@ extern void pm_runtime_enable(struct device *dev);
 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
 extern void pm_runtime_allow(struct device *dev);
 extern void pm_runtime_forbid(struct device *dev);
-extern int pm_generic_runtime_idle(struct device *dev);
 extern int pm_generic_runtime_suspend(struct device *dev);
 extern int pm_generic_runtime_resume(struct device *dev);
 extern void pm_runtime_no_callbacks(struct device *dev);
@@ -143,7 +142,6 @@ static inline bool pm_runtime_active(struct device *dev) { return true; }
 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
 
-static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
 static inline void pm_runtime_no_callbacks(struct device *dev) {}