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| author | Alan Stern <stern@rowland.harvard.edu> | 2007-05-30 23:38:16 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-13 03:34:30 +0400 |
| commit | f07600cf9eb3ee92777b2001e564faa413144a99 (patch) | |
| tree | e48f2e3051fde642e80269bf9c54b289d4abdb44 /drivers/hid | |
| parent | 624d6c0732d2c4ac00945ad79dbb6ff39ba90ee3 (diff) | |
| download | linux-f07600cf9eb3ee92777b2001e564faa413144a99.tar.xz | |
USB: add reset_resume method
This patch (as918) introduces a new USB driver method: reset_resume.
It is called when a device needs to be reset as part of a resume
procedure (whether because of a device quirk or because of the
USB-Persist facility), thereby taking over a role formerly assigned to
the post_reset method. As a consequence, post_reset no longer needs
an argument indicating whether it is being called as part of a
reset-resume. This separation of functions makes the code clearer.
In addition, the pre_reset and post_reset method return types are
changed; they now must return an error code. The return value is
unused at present, but at some later time we may unbind drivers and
re-probe if they encounter an error during reset handling.
The existing pre_reset and post_reset methods in the usbhid,
usb-storage, and hub drivers are updated to match the new
requirements. For usbhid the post_reset routine is also used for
reset_resume (duplicate method pointers); for the other drivers a new
reset_resume routine is added. The change to hub.c looks bigger than
it really is, because mark_children_for_reset_resume() gets moved down
next to the new hub_reset_resume() routine.
A minor change to usb-storage makes the usb_stor_report_bus_reset()
routine acquire the host lock instead of requiring the caller to hold
it already.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
CC: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/usbhid/hid-core.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index e221b0d1f667..b2baeaeba9be 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -1009,20 +1009,22 @@ static int hid_resume(struct usb_interface *intf) } /* Treat USB reset pretty much the same as suspend/resume */ -static void hid_pre_reset(struct usb_interface *intf) +static int hid_pre_reset(struct usb_interface *intf) { /* FIXME: What if the interface is already suspended? */ hid_suspend(intf, PMSG_ON); + return 0; } -static void hid_post_reset(struct usb_interface *intf, int reset_resume) +/* Same routine used for post_reset and reset_resume */ +static int hid_post_reset(struct usb_interface *intf) { struct usb_device *dev = interface_to_usbdev (intf); hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); /* FIXME: Any more reinitialization needed? */ - hid_resume(intf); + return hid_resume(intf); } static struct usb_device_id hid_usb_ids [] = { @@ -1039,6 +1041,7 @@ static struct usb_driver hid_driver = { .disconnect = hid_disconnect, .suspend = hid_suspend, .resume = hid_resume, + .reset_resume = hid_post_reset, .pre_reset = hid_pre_reset, .post_reset = hid_post_reset, .id_table = hid_usb_ids, |