redonkable/alistair23-linux
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USB: don't change HC power state for a FREEZE

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This patch (as1016) prevents PCI-based host controllers from
undergoing a power-state change during a FREEZE or a PRETHAW.  Such
changes are needed only during a SUSPEND.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2007-11-19 15:57:45 -05:00 committed by Greg Kroah-Hartman
parent 4145ed6dc5
commit 269954e542
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/core/hcd-pci.c
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@ -250,6 +250,12 @@ int usb_hcd_pci_suspend (struct pci_dev *dev, pm_message_t message)
pci_disable_device (dev);
}
if (message.event == PM_EVENT_FREEZE ||
message.event == PM_EVENT_PRETHAW) {
dev_dbg(hcd->self.controller, "--> no state change\n");
goto done;
}
if (!has_pci_pm) {
dev_dbg (hcd->self.controller, "--> PCI D0/legacy\n");
goto done;