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| author | Alan Stern <stern@rowland.harvard.edu> | 2009-11-13 11:53:59 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-11 11:55:21 -0800 |
| commit | fb34d53752d5bec5acc73422e462a9c68aeeaa2a (patch) | |
| tree | 6a395f2a0246cd3d721753c60af13e8f9b2e9c41 /Documentation/usb | |
| parent | 576a362ad2103da481e1f6e13de01f33d3d4c7b1 (diff) | |
| download | lwn-fb34d53752d5bec5acc73422e462a9c68aeeaa2a.tar.gz lwn-fb34d53752d5bec5acc73422e462a9c68aeeaa2a.zip | |
USB: remove the auto_pm flag
This patch (as1302) removes the auto_pm flag from struct usb_device.
The flag's only purpose was to distinguish between autosuspends and
external suspends, but that information is now available in the
pm_message_t argument passed to suspend methods.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/usb')
| -rw-r--r-- | Documentation/usb/power-management.txt | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/usb/power-management.txt b/Documentation/usb/power-management.txt index ad642615ad4c..8817368203d6 100644 --- a/Documentation/usb/power-management.txt +++ b/Documentation/usb/power-management.txt @@ -423,15 +423,16 @@ an URB had completed too recently. External suspend calls should never be allowed to fail in this way, only autosuspend calls. The driver can tell them apart by checking -udev->auto_pm; this flag will be set to 1 for internal PM events -(autosuspend or autoresume) and 0 for external PM events. +the PM_EVENT_AUTO bit in the message.event argument to the suspend +method; this bit will be set for internal PM events (autosuspend) and +clear for external PM events. Many of the ingredients in the autosuspend framework are oriented towards interfaces: The usb_interface structure contains the pm_usage_cnt field, and the usb_autopm_* routines take an interface pointer as their argument. But somewhat confusingly, a few of the -pieces (usb_mark_last_busy() and udev->auto_pm) use the usb_device -structure instead. Drivers need to keep this straight; they can call +pieces (i.e., usb_mark_last_busy()) use the usb_device structure +instead. Drivers need to keep this straight; they can call interface_to_usbdev() to find the device structure for a given interface. |