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Date: Sat, 29 Nov 2014 23:47:05 +0100
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alan Stern <stern@...land.harvard.edu>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux PM list <linux-pm@...r.kernel.org>,
USB development list <linux-usb@...r.kernel.org>
Subject: [Update 2x][PATCH] USB / PM: Drop CONFIG_PM_RUNTIME from the USB core
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
After commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so quite a few
#ifdef blocks depending on CONFIG_PM_RUNTIME may now be changed to
depend on CONFIG_PM (or even dropped in some cases).
Replace CONFIG_PM_RUNTIME with CONFIG_PM in the USB core code
and documentation.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
Added the Documentation/usb/power-management.txt changes.
Of course, this depends on commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME
if PM_SLEEP is selected) which is in linux-next only (via linux-pm) at the
moment.
---
Documentation/ABI/stable/sysfs-bus-usb | 14 ++++++--------
Documentation/ABI/testing/sysfs-bus-usb | 19 +++++++++----------
Documentation/usb/power-management.txt | 15 ++++++++-------
drivers/usb/core/driver.c | 6 +-----
drivers/usb/core/hcd-pci.c | 11 -----------
drivers/usb/core/hcd.c | 12 ++++--------
drivers/usb/core/hub.c | 6 +++---
drivers/usb/core/port.c | 4 ++--
drivers/usb/core/sysfs.c | 13 ++++---------
drivers/usb/core/usb.c | 4 +---
drivers/usb/core/usb.h | 23 +++++++++--------------
drivers/usb/host/ehci-pci.c | 2 +-
drivers/usb/host/sl811-hcd.c | 5 ++---
drivers/usb/host/u132-hcd.c | 3 +--
drivers/usb/host/xhci-hub.c | 2 +-
drivers/usb/host/xhci.c | 29 ++++++++++++-----------------
drivers/usb/phy/phy-msm-usb.c | 2 +-
include/linux/usb.h | 2 +-
include/linux/usb/hcd.h | 7 ++-----
19 files changed, 68 insertions(+), 111 deletions(-)
Index: linux-pm/drivers/usb/core/sysfs.c
===================================================================
--- linux-pm.orig/drivers/usb/core/sysfs.c
+++ linux-pm/drivers/usb/core/sysfs.c
@@ -334,14 +334,6 @@ static void remove_persist_attributes(st
&dev_attr_persist.attr,
power_group_name);
}
-#else
-
-#define add_persist_attributes(dev) 0
-#define remove_persist_attributes(dev) do {} while (0)
-
-#endif /* CONFIG_PM */
-
-#ifdef CONFIG_PM_RUNTIME
static ssize_t connected_duration_show(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -585,10 +577,13 @@ static void remove_power_attributes(stru
#else
+#define add_persist_attributes(dev) 0
+#define remove_persist_attributes(dev) do {} while (0)
+
#define add_power_attributes(dev) 0
#define remove_power_attributes(dev) do {} while (0)
-#endif /* CONFIG_PM_RUNTIME */
+#endif /* CONFIG_PM */
/* Descriptor fields */
Index: linux-pm/drivers/usb/core/driver.c
===================================================================
--- linux-pm.orig/drivers/usb/core/driver.c
+++ linux-pm/drivers/usb/core/driver.c
@@ -1493,10 +1493,6 @@ int usb_resume(struct device *dev, pm_me
return status;
}
-#endif /* CONFIG_PM */
-
-#ifdef CONFIG_PM_RUNTIME
-
/**
* usb_enable_autosuspend - allow a USB device to be autosuspended
* @udev: the USB device which may be autosuspended
@@ -1876,7 +1872,7 @@ int usb_set_usb2_hardware_lpm(struct usb
return ret;
}
-#endif /* CONFIG_PM_RUNTIME */
+#endif /* CONFIG_PM */
struct bus_type usb_bus_type = {
.name = "usb",
Index: linux-pm/drivers/usb/core/hcd-pci.c
===================================================================
--- linux-pm.orig/drivers/usb/core/hcd-pci.c
+++ linux-pm/drivers/usb/core/hcd-pci.c
@@ -429,7 +429,6 @@ static int check_root_hub_suspended(stru
return 0;
}
-#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_RUNTIME)
static int suspend_common(struct device *dev, bool do_wakeup)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
@@ -528,7 +527,6 @@ static int resume_common(struct device *
}
return retval;
}
-#endif /* SLEEP || RUNTIME */
#ifdef CONFIG_PM_SLEEP
@@ -607,8 +605,6 @@ static int hcd_pci_restore(struct device
#endif /* CONFIG_PM_SLEEP */
-#ifdef CONFIG_PM_RUNTIME
-
static int hcd_pci_runtime_suspend(struct device *dev)
{
int retval;
@@ -630,13 +626,6 @@ static int hcd_pci_runtime_resume(struct
return retval;
}
-#else
-
-#define hcd_pci_runtime_suspend NULL
-#define hcd_pci_runtime_resume NULL
-
-#endif /* CONFIG_PM_RUNTIME */
-
const struct dev_pm_ops usb_hcd_pci_pm_ops = {
.suspend = hcd_pci_suspend,
.suspend_noirq = hcd_pci_suspend_noirq,
Index: linux-pm/drivers/usb/core/port.c
===================================================================
--- linux-pm.orig/drivers/usb/core/port.c
+++ linux-pm/drivers/usb/core/port.c
@@ -72,7 +72,7 @@ static void usb_port_device_release(stru
kfree(port_dev);
}
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
static int usb_port_runtime_resume(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
@@ -171,7 +171,7 @@ static int usb_port_runtime_suspend(stru
#endif
static const struct dev_pm_ops usb_port_pm_ops = {
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
.runtime_suspend = usb_port_runtime_suspend,
.runtime_resume = usb_port_runtime_resume,
#endif
Index: linux-pm/drivers/usb/core/usb.c
===================================================================
--- linux-pm.orig/drivers/usb/core/usb.c
+++ linux-pm/drivers/usb/core/usb.c
@@ -49,7 +49,7 @@ const char *usbcore_name = "usbcore";
static bool nousb; /* Disable USB when built into kernel image */
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
static int usb_autosuspend_delay = 2; /* Default delay value,
* in seconds */
module_param_named(autosuspend, usb_autosuspend_delay, int, 0644);
@@ -348,11 +348,9 @@ static const struct dev_pm_ops usb_devic
.thaw = usb_dev_thaw,
.poweroff = usb_dev_poweroff,
.restore = usb_dev_restore,
-#ifdef CONFIG_PM_RUNTIME
.runtime_suspend = usb_runtime_suspend,
.runtime_resume = usb_runtime_resume,
.runtime_idle = usb_runtime_idle,
-#endif
};
#endif /* CONFIG_PM */
Index: linux-pm/drivers/usb/core/usb.h
===================================================================
--- linux-pm.orig/drivers/usb/core/usb.h
+++ linux-pm/drivers/usb/core/usb.h
@@ -75,6 +75,14 @@ extern int usb_resume_complete(struct de
extern int usb_port_suspend(struct usb_device *dev, pm_message_t msg);
extern int usb_port_resume(struct usb_device *dev, pm_message_t msg);
+extern void usb_autosuspend_device(struct usb_device *udev);
+extern int usb_autoresume_device(struct usb_device *udev);
+extern int usb_remote_wakeup(struct usb_device *dev);
+extern int usb_runtime_suspend(struct device *dev);
+extern int usb_runtime_resume(struct device *dev);
+extern int usb_runtime_idle(struct device *dev);
+extern int usb_set_usb2_hardware_lpm(struct usb_device *udev, int enable);
+
#else
static inline int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
@@ -87,20 +95,6 @@ static inline int usb_port_resume(struct
return 0;
}
-#endif
-
-#ifdef CONFIG_PM_RUNTIME
-
-extern void usb_autosuspend_device(struct usb_device *udev);
-extern int usb_autoresume_device(struct usb_device *udev);
-extern int usb_remote_wakeup(struct usb_device *dev);
-extern int usb_runtime_suspend(struct device *dev);
-extern int usb_runtime_resume(struct device *dev);
-extern int usb_runtime_idle(struct device *dev);
-extern int usb_set_usb2_hardware_lpm(struct usb_device *udev, int enable);
-
-#else
-
#define usb_autosuspend_device(udev) do {} while (0)
static inline int usb_autoresume_device(struct usb_device *udev)
{
@@ -111,6 +105,7 @@ static inline int usb_set_usb2_hardware_
{
return 0;
}
+
#endif
extern struct bus_type usb_bus_type;
Index: linux-pm/drivers/usb/core/hcd.c
===================================================================
--- linux-pm.orig/drivers/usb/core/hcd.c
+++ linux-pm/drivers/usb/core/hcd.c
@@ -2258,10 +2258,6 @@ int hcd_bus_resume(struct usb_device *rh
return status;
}
-#endif /* CONFIG_PM */
-
-#ifdef CONFIG_PM_RUNTIME
-
/* Workqueue routine for root-hub remote wakeup */
static void hcd_resume_work(struct work_struct *work)
{
@@ -2293,7 +2289,7 @@ void usb_hcd_resume_root_hub (struct usb
}
EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub);
-#endif /* CONFIG_PM_RUNTIME */
+#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
@@ -2476,7 +2472,7 @@ struct usb_hcd *usb_create_shared_hcd(co
init_timer(&hcd->rh_timer);
hcd->rh_timer.function = rh_timer_func;
hcd->rh_timer.data = (unsigned long) hcd;
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
INIT_WORK(&hcd->wakeup_work, hcd_resume_work);
#endif
@@ -2790,7 +2786,7 @@ error_create_attr_group:
hcd->rh_registered = 0;
spin_unlock_irq(&hcd_root_hub_lock);
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
cancel_work_sync(&hcd->wakeup_work);
#endif
mutex_lock(&usb_bus_list_lock);
@@ -2858,7 +2854,7 @@ void usb_remove_hcd(struct usb_hcd *hcd)
hcd->rh_registered = 0;
spin_unlock_irq (&hcd_root_hub_lock);
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
cancel_work_sync(&hcd->wakeup_work);
#endif
Index: linux-pm/drivers/usb/core/hub.c
===================================================================
--- linux-pm.orig/drivers/usb/core/hub.c
+++ linux-pm/drivers/usb/core/hub.c
@@ -1737,7 +1737,7 @@ static int hub_probe(struct usb_interfac
* - If user has indicated to prevent autosuspend by passing
* usbcore.autosuspend = -1 then keep autosuspend disabled.
*/
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
if (hdev->dev.power.autosuspend_delay >= 0)
pm_runtime_set_autosuspend_delay(&hdev->dev, 0);
#endif
@@ -3449,7 +3449,7 @@ int usb_port_resume(struct usb_device *u
return status;
}
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
int usb_remote_wakeup(struct usb_device *udev)
{
@@ -4856,7 +4856,7 @@ static void hub_port_connect_change(stru
udev->state != USB_STATE_NOTATTACHED) {
if (portstatus & USB_PORT_STAT_ENABLE) {
status = 0; /* Nothing to do */
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
} else if (udev->state == USB_STATE_SUSPENDED &&
udev->persist_enabled) {
/* For a suspended device, treat this as a
Index: linux-pm/drivers/usb/host/u132-hcd.c
===================================================================
--- linux-pm.orig/drivers/usb/host/u132-hcd.c
+++ linux-pm/drivers/usb/host/u132-hcd.c
@@ -3144,8 +3144,7 @@ static int u132_probe(struct platform_de
#ifdef CONFIG_PM
/*
* for this device there's no useful distinction between the controller
- * and its root hub, except that the root hub only gets direct PM calls
- * when CONFIG_PM_RUNTIME is enabled.
+ * and its root hub.
*/
static int u132_suspend(struct platform_device *pdev, pm_message_t state)
{
Index: linux-pm/drivers/usb/host/ehci-pci.c
===================================================================
--- linux-pm.orig/drivers/usb/host/ehci-pci.c
+++ linux-pm/drivers/usb/host/ehci-pci.c
@@ -305,7 +305,7 @@ static int ehci_pci_setup(struct usb_hcd
}
}
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
#endif
Index: linux-pm/drivers/usb/host/sl811-hcd.c
===================================================================
--- linux-pm.orig/drivers/usb/host/sl811-hcd.c
+++ linux-pm/drivers/usb/host/sl811-hcd.c
@@ -22,7 +22,7 @@
* and usb-storage.
*
* TODO:
- * - usb suspend/resume triggered by sl811 (with PM_RUNTIME)
+ * - usb suspend/resume triggered by sl811
* - various issues noted in the code
* - performance work; use both register banks; ...
* - use urb->iso_frame_desc[] with ISO transfers
@@ -1752,8 +1752,7 @@ sl811h_probe(struct platform_device *dev
#ifdef CONFIG_PM
/* for this device there's no useful distinction between the controller
- * and its root hub, except that the root hub only gets direct PM calls
- * when CONFIG_PM_RUNTIME is enabled.
+ * and its root hub.
*/
static int
Index: linux-pm/drivers/usb/host/xhci-hub.c
===================================================================
--- linux-pm.orig/drivers/usb/host/xhci-hub.c
+++ linux-pm/drivers/usb/host/xhci-hub.c
@@ -1146,7 +1146,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd
set_bit(port_index, &bus_state->bus_suspended);
}
/* USB core sets remote wake mask for USB 3.0 hubs,
- * including the USB 3.0 roothub, but only if CONFIG_PM_RUNTIME
+ * including the USB 3.0 roothub, but only if CONFIG_PM
* is enabled, so also enable remote wake here.
*/
if (hcd->self.root_hub->do_remote_wakeup
Index: linux-pm/drivers/usb/host/xhci.c
===================================================================
--- linux-pm.orig/drivers/usb/host/xhci.c
+++ linux-pm/drivers/usb/host/xhci.c
@@ -4024,7 +4024,7 @@ static int __maybe_unused xhci_change_ma
return ret;
}
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
/* BESL to HIRD Encoding array for USB2 LPM */
static int xhci_besl_encoding[16] = {125, 150, 200, 300, 400, 500, 1000, 2000,
@@ -4239,24 +4239,8 @@ int xhci_update_device(struct usb_hcd *h
return 0;
}
-#else
-
-int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
- struct usb_device *udev, int enable)
-{
- return 0;
-}
-
-int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
-{
- return 0;
-}
-
-#endif /* CONFIG_PM_RUNTIME */
-
/*---------------------- USB 3.0 Link PM functions ------------------------*/
-#ifdef CONFIG_PM
/* Service interval in nanoseconds = 2^(bInterval - 1) * 125us * 1000ns / 1us */
static unsigned long long xhci_service_interval_to_ns(
struct usb_endpoint_descriptor *desc)
@@ -4687,6 +4671,17 @@ int xhci_disable_usb3_lpm_timeout(struct
}
#else /* CONFIG_PM */
+int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
+ struct usb_device *udev, int enable)
+{
+ return 0;
+}
+
+int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+ return 0;
+}
+
int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd,
struct usb_device *udev, enum usb3_link_state state)
{
Index: linux-pm/drivers/usb/phy/phy-msm-usb.c
===================================================================
--- linux-pm.orig/drivers/usb/phy/phy-msm-usb.c
+++ linux-pm/drivers/usb/phy/phy-msm-usb.c
@@ -1761,7 +1761,7 @@ static int msm_otg_remove(struct platfor
return 0;
}
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
static int msm_otg_runtime_idle(struct device *dev)
{
struct msm_otg *motg = dev_get_drvdata(dev);
Index: linux-pm/Documentation/ABI/stable/sysfs-bus-usb
===================================================================
--- linux-pm.orig/Documentation/ABI/stable/sysfs-bus-usb
+++ linux-pm/Documentation/ABI/stable/sysfs-bus-usb
@@ -32,10 +32,9 @@ Date: January 2008
KernelVersion: 2.6.25
Contact: Sarah Sharp <sarah.a.sharp@...el.com>
Description:
- If CONFIG_PM_RUNTIME is enabled then this file
- is present. When read, it returns the total time (in msec)
- that the USB device has been connected to the machine. This
- file is read-only.
+ If CONFIG_PM is enabled, then this file is present. When read,
+ it returns the total time (in msec) that the USB device has been
+ connected to the machine. This file is read-only.
Users:
PowerTOP <powertop@...ts.01.org>
https://01.org/powertop/
@@ -45,10 +44,9 @@ Date: January 2008
KernelVersion: 2.6.25
Contact: Sarah Sharp <sarah.a.sharp@...el.com>
Description:
- If CONFIG_PM_RUNTIME is enabled then this file
- is present. When read, it returns the total time (in msec)
- that the USB device has been active, i.e. not in a suspended
- state. This file is read-only.
+ If CONFIG_PM is enabled, then this file is present. When read,
+ it returns the total time (in msec) that the USB device has been
+ active, i.e. not in a suspended state. This file is read-only.
Tools can use this file and the connected_duration file to
compute the percentage of time that a device has been active.
Index: linux-pm/Documentation/ABI/testing/sysfs-bus-usb
===================================================================
--- linux-pm.orig/Documentation/ABI/testing/sysfs-bus-usb
+++ linux-pm/Documentation/ABI/testing/sysfs-bus-usb
@@ -104,16 +104,15 @@ What: /sys/bus/usb/devices/.../power/us
Date: September 2011
Contact: Andiry Xu <andiry.xu@....com>
Description:
- If CONFIG_PM_RUNTIME is set and a USB 2.0 lpm-capable device
- is plugged in to a xHCI host which support link PM, it will
- perform a LPM test; if the test is passed and host supports
- USB2 hardware LPM (xHCI 1.0 feature), USB2 hardware LPM will
- be enabled for the device and the USB device directory will
- contain a file named power/usb2_hardware_lpm. The file holds
- a string value (enable or disable) indicating whether or not
- USB2 hardware LPM is enabled for the device. Developer can
- write y/Y/1 or n/N/0 to the file to enable/disable the
- feature.
+ If CONFIG_PM is set and a USB 2.0 lpm-capable device is plugged
+ in to a xHCI host which support link PM, it will perform a LPM
+ test; if the test is passed and host supports USB2 hardware LPM
+ (xHCI 1.0 feature), USB2 hardware LPM will be enabled for the
+ device and the USB device directory will contain a file named
+ power/usb2_hardware_lpm. The file holds a string value (enable
+ or disable) indicating whether or not USB2 hardware LPM is
+ enabled for the device. Developer can write y/Y/1 or n/N/0 to
+ the file to enable/disable the feature.
What: /sys/bus/usb/devices/.../removable
Date: February 2012
Index: linux-pm/include/linux/usb/hcd.h
===================================================================
--- linux-pm.orig/include/linux/usb/hcd.h
+++ linux-pm/include/linux/usb/hcd.h
@@ -93,7 +93,7 @@ struct usb_hcd {
struct timer_list rh_timer; /* drives root-hub polling */
struct urb *status_urb; /* the current status urb */
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
struct work_struct wakeup_work; /* for remote wakeup */
#endif
@@ -625,16 +625,13 @@ extern int usb_find_interface_driver(str
extern void usb_root_hub_lost_power(struct usb_device *rhdev);
extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
-#endif /* CONFIG_PM */
-
-#ifdef CONFIG_PM_RUNTIME
extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
#else
static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
{
return;
}
-#endif /* CONFIG_PM_RUNTIME */
+#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
Index: linux-pm/include/linux/usb.h
===================================================================
--- linux-pm.orig/include/linux/usb.h
+++ linux-pm/include/linux/usb.h
@@ -637,7 +637,7 @@ static inline bool usb_acpi_power_manage
#endif
/* USB autosuspend and autoresume */
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
extern void usb_enable_autosuspend(struct usb_device *udev);
extern void usb_disable_autosuspend(struct usb_device *udev);
Index: linux-pm/Documentation/usb/power-management.txt
===================================================================
--- linux-pm.orig/Documentation/usb/power-management.txt
+++ linux-pm/Documentation/usb/power-management.txt
@@ -47,14 +47,15 @@ dynamic PM is implemented in the USB sub
covered to some extent (see Documentation/power/*.txt for more
information about system PM).
-Note: Dynamic PM support for USB is present only if the kernel was
-built with CONFIG_USB_SUSPEND enabled (which depends on
-CONFIG_PM_RUNTIME). System PM support is present only if the kernel
-was built with CONFIG_SUSPEND or CONFIG_HIBERNATION enabled.
+System PM support is present only if the kernel was built with CONFIG_SUSPEND
+or CONFIG_HIBERNATION enabled. Dynamic PM support for USB is present whenever
+the kernel was built with CONFIG_PM enabled.
-(Starting with the 3.10 kernel release, dynamic PM support for USB is
-present whenever the kernel was built with CONFIG_PM_RUNTIME enabled.
-The CONFIG_USB_SUSPEND option has been eliminated.)
+[Historically, dynamic PM support for USB was present only if the
+kernel had been built with CONFIG_USB_SUSPEND enabled (which depended on
+CONFIG_PM_RUNTIME). Starting with the 3.10 kernel release, dynamic PM support
+for USB was present whenever the kernel was built with CONFIG_PM_RUNTIME
+enabled. The CONFIG_USB_SUSPEND option had been eliminated.]
What is Remote Wakeup?
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