Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-12 15:11:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

usbcore: small changes to hub driver's suspend method

Browse Source 
This patch (as847) makes some small changes to the hub driver's
suspend method:

	For root hubs, the status URB should be unlinked and other
	activity stopped _before_ the bus_suspend method is called.

	The test for hdev->bus being NULL has been removed, since
	it can never succeed.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2007-02-01 16:08:41 -05:00 committed by Greg Kroah-Hartman
parent 7fe89e9cc8
commit 12f1ff8351
1 changed files with 11 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/usb/core/hub.c
View File

@ -1904,6 +1904,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
struct usb_hub *hub = usb_get_intfdata (intf); struct usb_hub *hub = usb_get_intfdata (intf);
struct usb_device *hdev = hub->hdev; struct usb_device *hdev = hub->hdev;
unsigned port1; unsigned port1;
int status = 0;
/* fail if children aren't already suspended */ /* fail if children aren't already suspended */
for (port1 = 1; port1 <= hdev->maxchild; port1++) { for (port1 = 1; port1 <= hdev->maxchild; port1++) {
@ -1927,24 +1928,18 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
dev_dbg(&intf->dev, "%s\n", __FUNCTION__); dev_dbg(&intf->dev, "%s\n", __FUNCTION__);
/* "global suspend" of the downstream HC-to-USB interface */
if (!hdev->parent) {
struct usb_bus *bus = hdev->bus;
if (bus) {
int status = hcd_bus_suspend (bus);
if (status != 0) {
dev_dbg(&hdev->dev, "'global' suspend %d\n",
status);
return status;
}
} else
return -EOPNOTSUPP;
}
/* stop khubd and related activity */ /* stop khubd and related activity */
hub_quiesce(hub); hub_quiesce(hub);
return 0;
/* "global suspend" of the downstream HC-to-USB interface */
if (!hdev->parent) {
status = hcd_bus_suspend(hdev->bus);
if (status != 0) {
dev_dbg(&hdev->dev, "'global' suspend %d\n", status);
hub_activate(hub);
}
}
return status;
} }
static int hub_resume(struct usb_interface *intf) static int hub_resume(struct usb_interface *intf)