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authorAlan Stern <stern@rowland.harvard.edu>2005-11-14 11:45:38 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2006-01-04 13:48:31 -0800
commit1c50c317e2e7f15427149cbc216a63366468710e (patch)
treed48dc0b03090e89c644f73f9997b4f70b6ec9b41 /drivers/usb/host
parent8364d6b0be2dbbf162c6aea79615b5025a0d67c2 (diff)
[PATCH] USB: central handling for host controllers that were reset during suspend/resume
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>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/ehci-pci.c9
-rw-r--r--drivers/usb/host/ohci-hcd.c7
-rw-r--r--drivers/usb/host/sl811-hcd.c1
-rw-r--r--drivers/usb/host/uhci-hcd.c6
4 files changed, 8 insertions, 15 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index ac088bc72f1c..08ca0f849dab 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -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.
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index e3af3ac4416a..a4b12404ae08 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -795,7 +795,6 @@ static int ohci_restart (struct ohci_hcd *ohci)
int temp;
int i;
struct urb_priv *priv;
- struct usb_device *root = ohci_to_hcd(ohci)->self.root_hub;
/* mark any devices gone, so they do nothing till khubd disconnects.
* recycle any "live" eds/tds (and urbs) right away.
@@ -804,11 +803,7 @@ static int ohci_restart (struct ohci_hcd *ohci)
*/
spin_lock_irq(&ohci->lock);
disable (ohci);
- for (i = 0; i < root->maxchild; i++) {
- if (root->children [i])
- usb_set_device_state (root->children[i],
- USB_STATE_NOTATTACHED);
- }
+ usb_root_hub_lost_power(ohci_to_hcd(ohci)->self.root_hub);
if (!list_empty (&ohci->pending))
ohci_dbg(ohci, "abort schedule...\n");
list_for_each_entry (priv, &ohci->pending, pending) {
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index 3a9cd4607962..517360b77d8e 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -1803,6 +1803,7 @@ sl811h_resume(struct platform_device *dev)
|| !device_can_wakeup(&hcd->self.root_hub->dev)) {
sl811->port1 = 0;
port_power(sl811, 1);
+ usb_root_hub_lost_power(hcd->self.root_hub);
return 0;
}
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 1c0394cb3c89..071fab6b6475 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -748,8 +748,12 @@ static int uhci_resume(struct usb_hcd *hcd)
check_and_reset_hc(uhci);
configure_hc(uhci);
- if (uhci->rh_state == UHCI_RH_RESET)
+ if (uhci->rh_state == UHCI_RH_RESET) {
+
+ /* The controller had to be reset */
+ usb_root_hub_lost_power(hcd->self.root_hub);
suspend_rh(uhci, UHCI_RH_SUSPENDED);
+ }
spin_unlock_irq(&uhci->lock);