From f07600cf9eb3ee92777b2001e564faa413144a99 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Wed, 30 May 2007 15:38:16 -0400 Subject: 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 Signed-off-by: Jiri Kosina CC: Matthew Dharm Signed-off-by: Greg Kroah-Hartman --- drivers/hid/usbhid/hid-core.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/hid') 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, -- cgit v1.2.3-59-g8ed1b