redonkable/alistair23-linux
redonkable/alistair23-linux
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rt2x00: Fix URB error handling

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kill_urb guarentees that when the function returns, the URB has
been fully killed. This means we don't need the extra sleeping
after the call to kill_urb.

kill_urb can however also guarentee the submit_urb to fail, as
a result, we must catch the return value from submit_urb an
correctly mark the entry as owned by the driver, and the
status as broken.

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 2010-10-11 15:39:48 +02:00 committed by John W. Linville
parent 1a39769653
commit a13c8f3133
2 changed files with 9 additions and 10 deletions
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1
drivers/net/wireless/rt2x00/rt2x00dev.c
View file

@ -253,6 +253,7 @@ EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt);
void rt2x00lib_dmadone(struct queue_entry *entry)
{
clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
rt2x00queue_index_inc(entry->queue, Q_INDEX_DMA_DONE);
}
EXPORT_SYMBOL_GPL(rt2x00lib_dmadone);

18
drivers/net/wireless/rt2x00/rt2x00usb.c
View file

@ -253,7 +253,10 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
entry->skb->data, length,
rt2x00usb_interrupt_txdone, entry);
usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
if (usb_submit_urb(entry_priv->urb, GFP_ATOMIC)) {
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
}
}
void rt2x00usb_kick_tx_queue(struct data_queue *queue)
@ -280,14 +283,6 @@ static void rt2x00usb_kill_tx_entry(struct queue_entry *entry)
if ((entry->queue->qid == QID_BEACON) &&
(test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)))
usb_kill_urb(bcn_priv->guardian_urb);
/*
* We need a short delay here to wait for
* the URB to be canceled
*/
do {
udelay(100);
} while (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags));
}
void rt2x00usb_kill_tx_queue(struct data_queue *queue)
@ -469,7 +464,10 @@ void rt2x00usb_clear_entry(struct queue_entry *entry)
rt2x00usb_interrupt_rxdone, entry);
set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
if (usb_submit_urb(entry_priv->urb, GFP_ATOMIC)) {
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
}
}
}
EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);