[PATCH] rt2500usb: fix powersaving random failures

[Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>]

This patch seems to fix random powersaving failure where the device state is
stuck at 1 (STATE_SLEEP) and does not change to 3 (STATE_AWAKE), resulting in
to associate and these error messages:
phy0 -> rt2500usb_set_device_state: Error - Device failed to enter state 3 (-16).
No probe response from AP xx:xx:xx:xx:xx:xx after 500ms, disconnecting.

Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>

--- linux-2.6.34-rc2-orig/drivers/net/wireless/rt2x00/rt2500usb.c	2010-03-20 02:17:57.000000000 +0100
+++ linux-2.6.34-rc2/drivers/net/wireless/rt2x00/rt2500usb.c	2010-03-29 09:38:02.000000000 +0200
@@ -648,6 +648,10 @@
 
 		rt2x00_set_field16(&reg, MAC_CSR18_AUTO_WAKE, 1);
 		rt2500usb_register_write(rt2x00dev, MAC_CSR18, reg);
+	} else {
+		rt2500usb_register_read(rt2x00dev, MAC_CSR18, &reg);
+		rt2x00_set_field16(&reg, MAC_CSR18_AUTO_WAKE, 0);
+		rt2500usb_register_write(rt2x00dev, MAC_CSR18, reg);
 	}
 
 	rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);

-- 
Ondrej Zary
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