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USB: don't lose disconnections during suspend 

This patch (as1111) fixes a bug in the hub driver.  When a hub
resumes, disconnections that occurred while the hub was suspended are
lost.

A completely different fix for this problem has already been accepted
for 2.6.27; however the problem still needs to be handled in 2.6.26.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Lukas Hejtmanek <xhejtman@ics.muni.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2008-07-01 10:45:51 -04:00 committed by Greg Kroah-Hartman
parent de85422b94
commit 1236edf1c7
1 changed files with 4 additions and 11 deletions
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15
drivers/usb/core/hub.c
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@ -713,18 +713,11 @@ static void hub_restart(struct usb_hub *hub, int type)
}
/* Was the power session lost while we were suspended? */
switch (type) {
case HUB_RESET_RESUME:
portstatus = 0;
portchange = USB_PORT_STAT_C_CONNECTION;
break;
status = hub_port_status(hub, port1, &portstatus, &portchange);
case HUB_RESET:
case HUB_RESUME:
status = hub_port_status(hub, port1,
&portstatus, &portchange);
break;
}
/* If the device is gone, khubd will handle it later */
if (status == 0 && !(portstatus & USB_PORT_STAT_CONNECTION))
continue;
/* For "USB_PERSIST"-enabled children we must
* mark the child device for reset-resume and