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[PATCH] USB: central handling for host controllers that were reset during suspend/resume

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This patch (as515b) adds a routine to usbcore to simplify handling of
host controllers that lost power or were reset during suspend/resume.
The new core routine marks all the child devices of the root hub as
NOTATTACHED and tells khubd to disconnect the device structures as soon
as possible.

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
2005-11-14 11:45:38 -05:00
committed by Greg Kroah-Hartman
parent 8364d6b0be
commit 1c50c317e2
6 changed files with 42 additions and 15 deletions
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9
drivers/usb/host/ehci-pci.c
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@@ -278,7 +278,6 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
unsigned port;
struct usb_device *root = hcd->self.root_hub;
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
int retval = -EINVAL;
@@ -312,13 +311,7 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
restart:
ehci_dbg(ehci, "lost power, restarting\n");
for (port = HCS_N_PORTS(ehci->hcs_params); port > 0; ) {
port--;
if (!root->children [port])
continue;
usb_set_device_state(root->children[port],
USB_STATE_NOTATTACHED);
}
usb_root_hub_lost_power(hcd->self.root_hub);
/* Else reset, to cope with power loss or flush-to-storage
* style "resume" having let BIOS kick in during reboot.