ChangeSet 1.1587.3.52, 2004/05/11 15:57:51-07:00, [EMAIL PROTECTED]
[PATCH] USB: khubd turns port power back on after reset
This goes with the OHCI anti-deadlock patch, and is what
ensures that when a root hub loses power during suspend,
khubd can turn port power back on so devices can enumerate.
drivers/usb/core/hub.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletion(-)
diff -Nru a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
--- a/drivers/usb/core/hub.c Fri May 14 15:28:32 2004
+++ b/drivers/usb/core/hub.c Fri May 14 15:28:32 2004
@@ -1282,9 +1282,16 @@
/* Disconnect any existing devices under this port */
if (hub->children[port])
usb_disconnect(&hub->children[port]);
-
+
/* Return now if nothing is connected */
if (!(portstatus & USB_PORT_STAT_CONNECTION)) {
+
+ /* maybe switch power back on (e.g. root hub was reset) */
+ if ((hubstate->descriptor->wHubCharacteristics
+ & HUB_CHAR_LPSM) < 2
+ && !(portstatus & (1 << USB_PORT_FEAT_POWER)))
+ set_port_feature(hub, port + 1, USB_PORT_FEAT_POWER);
+
if (portstatus & USB_PORT_STAT_ENABLE)
goto done;
return;
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