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authorAlan Stern <stern@rowland.harvard.edu>2008-03-03 15:15:36 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2008-04-24 21:16:32 -0700
commit3bb1af5243d41af9518728445e9c9bd30dd47237 (patch)
tree83a82f0bb1ca4ab268b49a9d1e06548bb33e52ef /drivers/usb/host/ehci-pci.c
parent8f7f85e9f9561507b009d26395c53e70758695ec (diff)
downloadlinux-3bb1af5243d41af9518728445e9c9bd30dd47237.tar.bz2
USB: EHCI: carry out port handover during each root-hub resume
This patch (as1044) causes EHCI port handover for non-high-speed devices to occur during every root-hub resume, not just in cases where the controller lost power or was reset. This is necessary because: When some machines go into suspend, they remove power from on-board USB devices while retaining suspend current for USB controllers. The user might well unplug a USB device while the system is suspended and then plug it back in before resuming. A corresponding change is made to the core resume routine; now high-speed root hubs will always be resumed when the system wakes up, even if they were suspended before the system went to sleep. If this weren't done then EHCI port handover wouldn't work, since it is called when the EHCI root hub is resumed. Finally, a comment is added to the hub driver explaining the khubd has to be freezable; if it weren't frozen then it could interfere with port handover. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-pci.c')
-rw-r--r--drivers/usb/host/ehci-pci.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 72ccd56e36dd..040bd8632eb3 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -329,7 +329,6 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
/* here we "know" root ports should always stay powered */
ehci_port_power(ehci, 1);
- ehci_handover_companion_ports(ehci);
hcd->state = HC_STATE_SUSPENDED;
return 0;