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rt2x00: Implement watchdog monitoring

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Implement watchdog monitoring for USB devices (PCI support can
be added later). This will determine if URBs being uploaded to
the hardware are actually returning. Both rt2500usb and rt2800usb
have shown that URBs being uploaded can remain hanging without
being released by the hardware.
By using this watchdog, a queue can be reset when this occurs.
For rt2800usb it has been tested that the connection is preserved
even though this interruption.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ivo van Doorn
2010-07-11 12:25:46 +02:00
committed by John W. Linville
parent 223dcc2659
commit c965c74bbc
11 changed files with 159 additions and 3 deletions
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10
drivers/net/wireless/rt2x00/rt2x00usb.h
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@ -399,6 +399,16 @@ void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
void rt2x00usb_kill_tx_queue(struct rt2x00_dev *rt2x00dev,
const enum data_queue_qid qid);
/**
* rt2x00usb_watchdog - Watchdog for USB communication
* @rt2x00dev: Pointer to &struct rt2x00_dev
*
* Check the health of the USB communication and determine
* if timeouts have occured. If this is the case, this function
* will reset all communication to restore functionality again.
*/
void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev);
/*
* Device initialization handlers.
*/