diff options
author | Alan Stern <stern@rowland.harvard.edu> | 2007-09-10 11:34:26 -0400 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 14:55:26 -0700 |
commit | 6840d2555afd66290be7a39b400b5e66a840b82d (patch) | |
tree | cfc969126e5915db6536382cddbfdd9a63f5b3c8 /drivers/usb/core | |
parent | 95cf82f99cfbd697c15572c444bd4f54f19745b0 (diff) |
USB: flush outstanding URBs when suspending
This patch (as989) makes usbcore flush all outstanding URBs for each
device as the device is suspended. This will be true even when
CONFIG_USB_SUSPEND is not enabled.
In addition, an extra can_submit flag is added to the usb_device
structure. That flag will be turned off whenever a suspend request
has been received for the device, even if the device isn't actually
suspended because CONFIG_USB_SUSPEND isn't set.
It's no longer necessary to check for the device state being equal to
USB_STATE_SUSPENDED during URB submission; that check can be replaced
by a check of the can_submit flag. This also permits us to remove
some questionable references to the deprecated power.power_state field.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r-- | drivers/usb/core/driver.c | 10 | ||||
-rw-r--r-- | drivers/usb/core/hcd.c | 5 | ||||
-rw-r--r-- | drivers/usb/core/hub.c | 9 | ||||
-rw-r--r-- | drivers/usb/core/urb.c | 3 | ||||
-rw-r--r-- | drivers/usb/core/usb.c | 1 |
5 files changed, 16 insertions, 12 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index ca43a6f824ab..ba5bbc7eedcc 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -1102,9 +1102,16 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg) if (udev->auto_pm) autosuspend_check(udev); - /* If the suspend succeeded, propagate it up the tree */ + /* If the suspend succeeded then prevent any more URB submissions, + * flush any outstanding URBs, and propagate the suspend up the tree. + */ } else { cancel_delayed_work(&udev->autosuspend); + udev->can_submit = 0; + for (i = 0; i < 16; ++i) { + usb_hcd_flush_endpoint(udev, udev->ep_out[i]); + usb_hcd_flush_endpoint(udev, udev->ep_in[i]); + } if (parent) usb_autosuspend_device(parent); } @@ -1154,6 +1161,7 @@ static int usb_resume_both(struct usb_device *udev) status = -ENODEV; goto done; } + udev->can_submit = 1; /* Propagate the resume up the tree, if necessary */ if (udev->state == USB_STATE_SUSPENDED) { diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index e5874e8b8cbc..2c79aa6ca2b4 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1014,6 +1014,11 @@ int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) goto done; } + if (unlikely(!urb->dev->can_submit)) { + rc = -EHOSTUNREACH; + goto done; + } + /* * Check the host controller's state and add the URB to the * endpoint's queue. diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index bd08d51d7f41..691acf2223c2 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1955,14 +1955,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg) struct usb_device *udev; udev = hdev->children [port1-1]; - if (udev && msg.event == PM_EVENT_SUSPEND && -#ifdef CONFIG_USB_SUSPEND - udev->state != USB_STATE_SUSPENDED -#else - udev->dev.power.power_state.event - == PM_EVENT_ON -#endif - ) { + if (udev && udev->can_submit) { if (!hdev->auto_pm) dev_dbg(&intf->dev, "port %d nyet suspended\n", port1); diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index 76db76fdb4ec..c20c03aaf012 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -286,9 +286,6 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) return -EINVAL; if (!(dev = urb->dev) || dev->state < USB_STATE_DEFAULT) return -ENODEV; - if (dev->bus->controller->power.power_state.event != PM_EVENT_ON - || dev->state == USB_STATE_SUSPENDED) - return -EHOSTUNREACH; /* For now, get the endpoint from the pipe. Eventually drivers * will be required to set urb->ep directly and we will eliminate diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index e5ff161776fa..8121edbd1494 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -272,6 +272,7 @@ usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1) dev->ep0.desc.bDescriptorType = USB_DT_ENDPOINT; /* ep0 maxpacket comes later, from device descriptor */ usb_enable_endpoint(dev, &dev->ep0); + dev->can_submit = 1; /* Save readable and stable topology id, distinguishing devices * by location for diagnostics, tools, driver model, etc. The |