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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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2
drivers/net/wireless/rt2x00/rt2800usb.c
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@@ -633,6 +633,7 @@ static int rt2800usb_probe_hw(struct rt2x00_dev *rt2x00dev)
if (!modparam_nohwcrypt)
__set_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags);
__set_bit(DRIVER_SUPPORT_LINK_TUNING, &rt2x00dev->flags);
__set_bit(DRIVER_SUPPORT_WATCHDOG, &rt2x00dev->flags);
/*
* Set the rssi offset.
@@ -655,6 +656,7 @@ static const struct rt2x00lib_ops rt2800usb_rt2x00_ops = {
.link_stats = rt2800_link_stats,
.reset_tuner = rt2800_reset_tuner,
.link_tuner = rt2800_link_tuner,
.watchdog = rt2x00usb_watchdog,
.write_tx_desc = rt2800usb_write_tx_desc,
.write_tx_data = rt2800usb_write_tx_data,
.write_beacon = rt2800_write_beacon,