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-rw-r--r--drivers/usb/core/generic.c45
-rw-r--r--drivers/usb/core/hcd.c52
-rw-r--r--drivers/usb/core/hcd.h14
-rw-r--r--drivers/usb/core/hub.c42
4 files changed, 59 insertions, 94 deletions
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index d363b0ea734..4cbe7b33951 100644
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -196,20 +196,15 @@ static int generic_suspend(struct usb_device *udev, pm_message_t msg)
{
int rc;
- rc = usb_port_suspend(udev);
-
- /* Root hubs don't have upstream ports to suspend,
- * so the line above won't do much for them. We have to
- * shut down their downstream HC-to-USB interfaces manually,
- * by doing a bus (or "global") suspend.
+ /* Normal USB devices suspend through their upstream port.
+ * Root hubs don't have upstream ports to suspend,
+ * so we have to shut down their downstream HC-to-USB
+ * interfaces manually by doing a bus (or "global") suspend.
*/
- if (rc == 0 && !udev->parent) {
- rc = hcd_bus_suspend(udev->bus);
- if (rc) {
- dev_dbg(&udev->dev, "'global' suspend %d\n", rc);
- usb_port_resume(udev);
- }
- }
+ if (!udev->parent)
+ rc = hcd_bus_suspend(udev);
+ else
+ rc = usb_port_suspend(udev);
return rc;
}
@@ -217,25 +212,17 @@ static int generic_resume(struct usb_device *udev)
{
int rc;
- if (udev->reset_resume)
+ /* Normal USB devices resume/reset through their upstream port.
+ * Root hubs don't have upstream ports to resume or reset,
+ * so we have to start up their downstream HC-to-USB
+ * interfaces manually by doing a bus (or "global") resume.
+ */
+ if (!udev->parent)
+ rc = hcd_bus_resume(udev);
+ else if (udev->reset_resume)
rc = usb_reset_suspended_device(udev);
else
rc = usb_port_resume(udev);
-
- /* Root hubs don't have upstream ports to resume or reset,
- * so the line above won't do much for them. We have to
- * start up their downstream HC-to-USB interfaces manually,
- * by doing a bus (or "global") resume.
- */
- if (rc == 0 && !udev->parent) {
- rc = hcd_bus_resume(udev->bus);
- if (rc)
- dev_dbg(&udev->dev, "'global' resume %d\n", rc);
- else {
- /* TRSMRCY = 10 msec */
- msleep(10);
- }
- }
return rc;
}
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 87d6edf11f9..e5058fb26a7 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1257,40 +1257,54 @@ rescan:
#ifdef CONFIG_PM
-int hcd_bus_suspend (struct usb_bus *bus)
+int hcd_bus_suspend(struct usb_device *rhdev)
{
- struct usb_hcd *hcd;
- int status;
+ struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self);
+ int status;
+ int old_state = hcd->state;
- hcd = container_of (bus, struct usb_hcd, self);
- if (!hcd->driver->bus_suspend)
- return -ENOENT;
- hcd->state = HC_STATE_QUIESCING;
- status = hcd->driver->bus_suspend (hcd);
- if (status == 0)
+ dev_dbg(&rhdev->dev, "bus %s%s\n",
+ rhdev->auto_pm ? "auto-" : "", "suspend");
+ if (!hcd->driver->bus_suspend) {
+ status = -ENOENT;
+ } else {
+ hcd->state = HC_STATE_QUIESCING;
+ status = hcd->driver->bus_suspend(hcd);
+ }
+ if (status == 0) {
+ usb_set_device_state(rhdev, USB_STATE_SUSPENDED);
hcd->state = HC_STATE_SUSPENDED;
- else
- dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n",
+ } else {
+ hcd->state = old_state;
+ dev_dbg(&rhdev->dev, "bus %s fail, err %d\n",
"suspend", status);
+ }
return status;
}
-int hcd_bus_resume (struct usb_bus *bus)
+int hcd_bus_resume(struct usb_device *rhdev)
{
- struct usb_hcd *hcd;
- int status;
+ struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self);
+ int status;
- hcd = container_of (bus, struct usb_hcd, self);
+ dev_dbg(&rhdev->dev, "usb %s%s\n",
+ rhdev->auto_pm ? "auto-" : "", "resume");
if (!hcd->driver->bus_resume)
return -ENOENT;
if (hcd->state == HC_STATE_RUNNING)
return 0;
+
hcd->state = HC_STATE_RESUMING;
- status = hcd->driver->bus_resume (hcd);
- if (status == 0)
+ status = hcd->driver->bus_resume(hcd);
+ if (status == 0) {
+ /* TRSMRCY = 10 msec */
+ msleep(10);
+ usb_set_device_state(rhdev, rhdev->actconfig
+ ? USB_STATE_CONFIGURED
+ : USB_STATE_ADDRESS);
hcd->state = HC_STATE_RUNNING;
- else {
- dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n",
+ } else {
+ dev_dbg(&rhdev->dev, "bus %s fail, err %d\n",
"resume", status);
usb_hc_died(hcd);
}
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index ef50fa494e4..b5ebb73c233 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -364,23 +364,13 @@ extern int usb_find_interface_driver (struct usb_device *dev,
#ifdef CONFIG_PM
extern void usb_hcd_resume_root_hub (struct usb_hcd *hcd);
extern void usb_root_hub_lost_power (struct usb_device *rhdev);
-extern int hcd_bus_suspend (struct usb_bus *bus);
-extern int hcd_bus_resume (struct usb_bus *bus);
+extern int hcd_bus_suspend(struct usb_device *rhdev);
+extern int hcd_bus_resume(struct usb_device *rhdev);
#else
static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
{
return;
}
-
-static inline int hcd_bus_suspend(struct usb_bus *bus)
-{
- return 0;
-}
-
-static inline int hcd_bus_resume (struct usb_bus *bus)
-{
- return 0;
-}
#endif /* CONFIG_PM */
/*
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 04d6fde57d8..ac1ef1527dd 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1722,17 +1722,8 @@ int usb_port_suspend(struct usb_device *udev)
{
int status = 0;
- /* we change the device's upstream USB link,
- * but root hubs have no upstream USB link.
- */
- if (udev->parent)
- status = hub_port_suspend(hdev_to_hub(udev->parent),
- udev->portnum, udev);
- else {
- dev_dbg(&udev->dev, "usb %ssuspend\n",
- udev->auto_pm ? "auto-" : "");
- usb_set_device_state(udev, USB_STATE_SUSPENDED);
- }
+ status = hub_port_suspend(hdev_to_hub(udev->parent),
+ udev->portnum, udev);
return status;
}
@@ -1775,8 +1766,7 @@ static int finish_port_resume(struct usb_device *udev)
status);
else if (udev->actconfig) {
le16_to_cpus(&devstatus);
- if ((devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP))
- && udev->parent) {
+ if (devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
status = usb_control_msg(udev,
usb_sndctrlpipe(udev, 0),
USB_REQ_CLEAR_FEATURE,
@@ -1789,10 +1779,6 @@ static int finish_port_resume(struct usb_device *udev)
"wakeup, status %d\n", status);
}
status = 0;
-
- } else if (udev->devnum <= 0) {
- dev_dbg(&udev->dev, "bogus resume!\n");
- status = -EINVAL;
}
return status;
}
@@ -1821,9 +1807,8 @@ hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev)
port1, status);
} else {
/* drive resume for at least 20 msec */
- if (udev)
- dev_dbg(&udev->dev, "usb %sresume\n",
- udev->auto_pm ? "auto-" : "");
+ dev_dbg(&udev->dev, "usb %sresume\n",
+ udev->auto_pm ? "auto-" : "");
msleep(25);
#define LIVE_FLAGS ( USB_PORT_STAT_POWER \
@@ -1851,8 +1836,7 @@ SuspendCleared:
USB_PORT_FEAT_C_SUSPEND);
/* TRSMRCY = 10 msec */
msleep(10);
- if (udev)
- status = finish_port_resume(udev);
+ status = finish_port_resume(udev);
}
}
if (status < 0)
@@ -1882,18 +1866,8 @@ int usb_port_resume(struct usb_device *udev)
{
int status;
- /* we change the device's upstream USB link,
- * but root hubs have no upstream USB link.
- */
- if (udev->parent) {
- // NOTE this fails if parent is also suspended...
- status = hub_port_resume(hdev_to_hub(udev->parent),
- udev->portnum, udev);
- } else {
- dev_dbg(&udev->dev, "usb %sresume\n",
- udev->auto_pm ? "auto-" : "");
- status = finish_port_resume(udev);
- }
+ status = hub_port_resume(hdev_to_hub(udev->parent),
+ udev->portnum, udev);
if (status < 0)
dev_dbg(&udev->dev, "can't resume, status %d\n", status);
return status;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-26 14:37:56 +0000