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authorDavid Brownell <david-b@pacbell.net>2006-08-14 23:11:06 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-25 21:08:37 -0700
commit185849991d592497e43bcd264c6152af1261ffe2 (patch)
tree856077e37e40bbda2af95fe64aaa92db626f30de /drivers/usb/host/ehci-pci.c
parentc78a7c2dd913e68ce853d43edaba14eac91b2fd1 (diff)
PM: USB HCDs use PM_EVENT_PRETHAW
This teaches several USB host controller drivers to treat PRETHAW as a chip reset since the controller, and all devices connected to it, are no longer in states compatible with how the snapshotted suspend() left them. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> 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.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index cadffacd945..6967ab71e28 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -238,6 +238,12 @@ static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
writel (0, &ehci->regs->intr_enable);
(void)readl(&ehci->regs->intr_enable);
+ /* make sure snapshot being resumed re-enumerates everything */
+ if (message.event == PM_EVENT_PRETHAW) {
+ ehci_halt(ehci);
+ ehci_reset(ehci);
+ }
+
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
bail:
spin_unlock_irqrestore (&ehci->lock, flags);